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1st cousin marriage

1000 replies

Wiseplumnet · 26/08/2026 16:00

AIBU to ask your opinion on 1st cousin marriage?.I have read that the government is looking to ban it. I know it is more prevelent ( but declining) in the UK among people of Asian origin. I am not coming from a judgemental or racist angle. I am just interested to know how mum'snetters of all ethnicities feel about marriage between 1st cousin's. I know it used to be more common in the west at one time, apart from keeping money/property in families, people travelled less widely, so there was less choice of marriage partners.I worked with a girl ( White British) who was in a secret relationship with her 1st cousin and they are very reluctant to tell their family, so there seems to be a cultural taboo in 1st cousins being romantically involved.Genetic factors resulting in disabilities (statistically twice as many as in unrelated parents) is sometimes given as a reason for banning cousin marriage, however we have genetic screening now, and disabilities aren't always serious.As so many babies died in infancy before we had vaccines, better health care etc , it was probably difficult to differentiate whether the close relationship between parents was the cause of any disabilities their children . Speaking for myself,I can't imagine wanting to marry any of the cousins I was brought up with as they seem more like brothers to me, but I could understand why someone may be attracted to a 1st cousin who they first met as adults. Or does it give you the instant 'Yuk' ? Also is banning 1st cousin marriage the same as banning 1st cousin sexual relationships and children, or would that become illegal? Maybe there's no need for a legal ban as the tradition will just die out over time

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Whynottryagain · 28/08/2026 21:38

It wouldn't bother me particularly and I wouldn't ban it because I don't really see that it's much of a problem.

Maybe I feel like this because I've only met my cousins a handful of times in 30 years, so they barely even feel like relatives to me. I don't know.

gezzab33 · 28/08/2026 21:44

My husband's cousins are married to each other and their fathers are twins. It's not ideal...

x2boys · 28/08/2026 21:49

Whynottryagain · 28/08/2026 21:38

It wouldn't bother me particularly and I wouldn't ban it because I don't really see that it's much of a problem.

Maybe I feel like this because I've only met my cousins a handful of times in 30 years, so they barely even feel like relatives to me. I don't know.

As a one off first cousins marrying and having children isnt a huge problem
But surely you can see that in communities where first cousins marrrying and having children is commen the that massivly increases the risk of children being born with significant disabillities ?
In these communties its generation after generation marrying their first cousins.

x2boys · 28/08/2026 21:51

gezzab33 · 28/08/2026 21:44

My husband's cousins are married to each other and their fathers are twins. It's not ideal...

Identicle?
If so surely that makes them biological hslf siblings ?

BlueFahrenheit · 28/08/2026 21:59

gezzab33 · 28/08/2026 21:44

My husband's cousins are married to each other and their fathers are twins. It's not ideal...

Ugh, my stomach churned.

🤮

pinkstripeycat · 28/08/2026 22:04

It’s revolting. The thought of one of my sons marrying my niece is disgusting.

pinkstripeycat · 28/08/2026 22:04

BlueFahrenheit · 28/08/2026 21:59

Ugh, my stomach churned.

🤮

Same

SnowFrogJelly · 28/08/2026 23:34

pinkstripeycat · 28/08/2026 22:04

It’s revolting. The thought of one of my sons marrying my niece is disgusting.

Why is it disgusting?

It’s allowed and one of my family members married a cousin so be careful what you say

NeedANapAgain · 29/08/2026 00:47

Gwenhwyfar · 26/08/2026 17:07

Haemophilia was rife in her descendants if you include female carriers too.
It's a really strange example to give in favour of cousin marriage.

Probably already answered, but Victoria being a carrier for hemophilia had nothing to do with marrying her cousin. It was a spontaneous mutation, most likely caused by her father being over 50 when she was conceived.

NeedANapAgain · 29/08/2026 00:47

Chocolatelabsarebest · 26/08/2026 16:58

Those who want to ban it - have you remembered that Queen Victoria married her first cousin?

So did Darwin. What’s your point?

NeedANapAgain · 29/08/2026 01:02

dustabsorber · 26/08/2026 17:30

Which led to haemophilia.

Cousins marrying does not lead to hemophilia, nor any other genetic disorder. The problem is if two people share common family that are carriers of a genetic disorder, the chances of both these people being carriers and passing it onto their offspring increases greatly. Take these intermarriages a few more generations down, and chances are most descendants either have the disease or are a carrier.

It’s not about one-offs, it’s about generational cosanguination.

Pieceofpurplesky · 29/08/2026 01:07

I know three sets of cousins who married - all are late 50s/early 60s. Went to school with half of 2 couples and worked with another couple who married later and both had kids). Couple one have 2 kids and seem really happy, couple 2 are happy but have a child with disabilities and I know they struggle.
It was not seen as an issue at the time really - we were just aware (true of not) that there could be 'birth defects' (that was the term used). I have lots of cousins and couldn't see me marrying any of them!

bafta16 · 29/08/2026 08:59

@RafaFan

if parents are first cousins, the chance is around 5% to 6% ( of a child having a health condition)

From the document you cited.

BlueFahrenheit · 29/08/2026 09:14

SnowFrogJelly · 28/08/2026 23:34

Why is it disgusting?

It’s allowed and one of my family members married a cousin so be careful what you say

Incest.

Something I frown upon.

5MinuteArgument · 29/08/2026 09:30

zanahoria · 28/08/2026 18:00

The main reason that it was not banned by law is because there was little reason to do so as cases were isolated. It was briefly popular among aristocrats and other wealthy classes in the 19th century but by the 20rh century it accounted for less than 1% of marriages.

Yes, it's one of the impacts of having a multicultural society. This practice had more or less died out in the resident population. It was just the occasional couple who married as first cousins but very much a tiny minority, so not a problem.

But with incoming populations who practice this as a cultural norm, generation after generation, we can see the harm and the cost that ensues, so we need to ban it.

5MinuteArgument · 29/08/2026 09:43

I can't see it being banned though. Politicians are courting the Muslim vote, especially Labour politicians.

As well as the suffering of the children and the cost, it also creates more insular and clan-based communities which is bad for social cohesion overall. But I'll be very surprised is anything is ever done about it, apart from the odd leaflet.

TunnocksOrDeath · 29/08/2026 09:48

LifetimesAgo · 28/08/2026 18:14

Exactly. Due to naturally evolved aversion and social improvements it became rare so wasn’t necessary to legislate against. The fact it has become MORE common than 100 years ago demonstrates why it is now absolutely necessary to legislate against, particularly as other methods such as education and public health campaigns have failed to bring it back down even to the levels of occurrence on a per capita basis even before genetic inbreeding was proved to cause disease and disabilities. That fact alone is shocking. And then when you look at the distribution of it across the population it is clear that there are pockets of this in certain communities which is even more harmful than if this was widespread; socially, economically, and in terms of preventing abuse and harm.

There has never been a situation in the UK since modern recorded history began, even when most people lived in very small communities, where the level of inbreeding was as high as it is in some of the communities now deliberately practicing this in the UK, and there is no necessity for them to do so (e.g. they live in a farming community with no transport so only ever meet the few thousand people who live locally enough to be accessed by riding a horse).

The medieval worldview driving this abhorrent behaviour causes immense and unnecessary harm to children and is part of a pattern of behaviour which restricts women’s freedom, and wider society is paying a huge cost for it. It has no benefit to society or individuals at all. It’s obvious that we need to clamp down on it very hard, and stamp it out to the greatest extent possible.

Continuation of this being legal is not compatible with the principles of law of the UK, our social values, with science, with the imperative to protect children from easily avoidable and unnecessary harm, with the social contract of what taxpayers should pay to fund, with social cohesion and integration, with the protection of women from abuse, with anything of any value that most people in the UK hold in esteem and the very things that make this a good place to live, so it must be prohibited by law like all other behaviours that are so harmful they will undermine the above.

Just a quick defence of the Medieval period - cosanguineous marriage was generally frowned on even then. Eleanor of Aquitaine’s 1st marriage was annulled on the grounds that as 3rd cousins once removed they were too closely related, and she needed a papal dispensation to marry her 2nd husband (a 3rd cousin). Even marrying your sibling’s widow(er) required a dispensation - which was granted in the case of Katherine of Aragon and was one of the main obstacles to Henry VIII securing a divorce.

bafta16 · 29/08/2026 09:55

5MinuteArgument · 29/08/2026 09:43

I can't see it being banned though. Politicians are courting the Muslim vote, especially Labour politicians.

As well as the suffering of the children and the cost, it also creates more insular and clan-based communities which is bad for social cohesion overall. But I'll be very surprised is anything is ever done about it, apart from the odd leaflet.

Not all Muslims are in support of this.

ChakaKan · 29/08/2026 09:58

SnowFrogJelly · 28/08/2026 23:34

Why is it disgusting?

It’s allowed and one of my family members married a cousin so be careful what you say

so be careful what you say
Or else what? Confused
Lots of people find the idea vile (and are entitled to) especially if they have grown up with their cousins and behaved like family.

5MinuteArgument · 29/08/2026 10:00

bafta16 · 29/08/2026 09:55

Not all Muslims are in support of this.

No, I'm sure that's true. But it is practised widely enough within the Muslim community for it to be a problem both for them and the wider society.

5MinuteArgument · 29/08/2026 10:00

TunnocksOrDeath · 29/08/2026 09:48

Just a quick defence of the Medieval period - cosanguineous marriage was generally frowned on even then. Eleanor of Aquitaine’s 1st marriage was annulled on the grounds that as 3rd cousins once removed they were too closely related, and she needed a papal dispensation to marry her 2nd husband (a 3rd cousin). Even marrying your sibling’s widow(er) required a dispensation - which was granted in the case of Katherine of Aragon and was one of the main obstacles to Henry VIII securing a divorce.

I sometimes get the feeling we're going backwards as a society!

Banjas · 29/08/2026 10:06

I would 1st cousin marriages banned.

zanahoria · 29/08/2026 10:16

TunnocksOrDeath · 29/08/2026 09:48

Just a quick defence of the Medieval period - cosanguineous marriage was generally frowned on even then. Eleanor of Aquitaine’s 1st marriage was annulled on the grounds that as 3rd cousins once removed they were too closely related, and she needed a papal dispensation to marry her 2nd husband (a 3rd cousin). Even marrying your sibling’s widow(er) required a dispensation - which was granted in the case of Katherine of Aragon and was one of the main obstacles to Henry VIII securing a divorce.

The Roman Catholic Church was vehemently against cousin marriage as it rightly saw it as a practice that enforced the tribal society of the Germanic hordes that had conquered the Roman Empire in the west. They start to condemn it from a very early date, soon after the invasions had occurred. Remarkably they were successful, over the centuries the invading Goths, Vandals etc became Christians and followed the church's teachings on cousin marriage.

nomas · 29/08/2026 10:19

zanahoria · 29/08/2026 10:16

The Roman Catholic Church was vehemently against cousin marriage as it rightly saw it as a practice that enforced the tribal society of the Germanic hordes that had conquered the Roman Empire in the west. They start to condemn it from a very early date, soon after the invasions had occurred. Remarkably they were successful, over the centuries the invading Goths, Vandals etc became Christians and followed the church's teachings on cousin marriage.

Too bad the Catholic Church didn’t condemn child abuse by priests then.

FilthyforFirth · 29/08/2026 10:33

I would support a ban, screams incest to me. My cousins are like siblings and I grew up with them but even if I didnt they are still your family. My children are all close to their cousins as well. Bleugh.

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