Thomas or Tommy?

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Baby will have a (second) cousin Thomas, known day to day as Thomas.

Baby would be known as Tommy.

What's mumsnet's thoughts on the BC... Thomas or Tommy?

Currently Thomas is ranked 17 where we live, and Tommy is 27... so people must be doing both!

Definitely only Thomas.

Thomas on the BC and then use Tommy. I don’t see what the issue is?

Thomas on birth certificate. Tommy as a nickname. Thomas is more classic.

Thomas :) lovely name!

Thomas and use Tommy as a nickname.
Thomas is more classic and allows him to use a more grown-up Thomas / Tom in a professional setting.

Thomas. Although if yours is anything like mine, you will end up with him being called loads of variations of Tom/Tommy/Tommo/Tombola - so don't rely on Tommy being the most used...

Love Tom/Thomas but feel Tommy ruins a lovely name.

Thomas. Tommy is a bit on the cutesy side, and he will likely appreciate the option of a more ‘grown up’ alternative as a teenager/adult.

Thomas. I have one. Known as Tom to many outside family - his choice

Never Tommy. Ok for a baby perhaps but not after that.

@campion The name would be in honour of baby's great grandfather, who was officially Thomas but never known as that, always Tommy, through adulthood and old age.

So to me totally fine to be Tommy later in life.

Prefer Tommy to Thomas and wouldn't really want baby to be known as Thomas... just not sure if he should have a more 'formal' BC name?

@LizzieBet14 As above... Tommy would be after great grandfather, so would be keen for Tommy to be used rather than Tom or Thomas

Thomas. Then he will have the choice to shorten.

Put Thomas on the birth cert, then always call him Tommy. He can choose when he's older if he wishes.

I'm doing the same as you op, naming my next child (If a boy) after his great grandfather who always went by his nickname and never the full version of that name, I did wonder about the birth certificate too 🤔

Thomas on the birth certificate but use Tommy day to day.
It just gives him more options when he's an adult.

Also, it will be assumed all his life that he is a Thomas. Make it easier for him.

I’d go with Tommy, I was given a ‘formal’ version of my name on birth certificate, and it’s never used . Doesn’t feel like ‘my’ name.

Don’t understand the need for options on names tbh. I don’t think the ‘can you imagine a CV with this name on’ works anymore, it’s so so common for people to have so called ‘nicknames’ as given names now (I mean, by the CVs I see), so will be even more common and unremarkable in 20 years.

Thomas is lovely. Classic.

Tommy is awful sorry.

If it's in honour of his great Grandfather then go with Tommy. I did it with my son too.

When I was naming my children I imagined them in all sorts of careers and wanted a name to fit in any circumstance. Ridiculous I know but I daydreamed that they may be PM or marry royalty (lighthearted so don’t laugh) and so a nickname wouldn’t do.

Definitely Thomas. Call him Tommy day to day, if you like, but don’t be surprised if he changes it himself as a teen. I don’t think it’s fair to force a formal nickname on a baby.

Mine's Tommy on the bc. Also after his grandad

I would put Tommy on the birth certificate if that's what he's going to be called. There's nothing to stop him calling himself Thomas later if he wants to. I'm known by my nickname and having a different name on my birth certificate just makes it complicated.

I put the full length name of one of my dc on the birth certificate and I regret it. It's not their name and I don't think they will ever use it. I did it because everyone said I should but wish I hadn't.

@GintyMcGinty saying "sorry" after writing something unnecessarily mean doesn't make it any better.