Thoughts on these baby names and how well they travel abroad?

Rupert is awful imo.

i like Magnus

Children will always find a way to mock others' names. It's more about the children than the names. A popular child can carry a 'nerdy' name but an unpopular child will be mocked regardless.

As an American living in the UK for many years now and having worked in schools here, I'd say your choices are very much the kind of names British parents choose and somewhat niche. So if he's living in a semi and going to state school in the UK, he'll be fine. Reggie and Magnus are my least favourite; Angus is better than Gus.
Most of these names are not well known in the US but if you are not living there permanently, it won't matter. They can all be pronounced at first glance. Keir/Rafe/Ivor are probably the most tricky for that.

If you are expecting to live abroad periodically, presumably your DS will go to English-speaking schools and mix with other ex-pats, both British and more international, so it might not matter, if you are posted to, say, Dubai or Hong Kong

If you want a more 'international' name, you'll need to choose a Biblical, Roman or Greek name: e.g. Thomas/Samuel/Matthew/Jude/Tobias, Julian/Marcus/Maximus (makes me think of Gladiator ...) , Alexander/Hector/Nicholas - these have local pronunciations in most of the western and some non-western languages.

You wouldn't know though probably. The teasing wouldn't be done in front of teachers or parents.

I was teased but I didn't mention it to my parents. It was either fairly mild (e.g. Cowbell because the surname was Cowell) or it was done by knobheads (e.g. Smelly Ellie).

exactly. we haven't got high school yet but I honestly don't know any kids that are bullied for their names. they're so diverse these days😄, from grandparents chic to mommy put random letters together but when everything is so multicoloured, no one stops to pick on teal for being a weird colour, it's just part of the painting.

Of Norse origin (Ivarr) via Welsh (Ifor).

I know a couple of Irish Ivors too, one in his 50s and one in his teens. It’s not really popular for Irish babies anymore though. I think the name was Norse originally.

Fergus is a very normal Irish name to me too, though again it’s not much used for babies nowadays.

I love the name Keir but some may think it's a bit tainted now

Fergus would go down well in areas with sizeable Irish populations in the US.

I like:

Hector
Jude
Keir
and
Tobias nickname Toby

Does anyone actually use Keir?

Romeo is ridiculous and I'm not fond of Maximus.

The others are all fine - though I can imagine Rupert might not travel well/be easy to pronounce in every language.

It probably depends on the group of kids you get. Some years do seem to be nicer than others.

I generally got the piss taken out of my last name. Several variations of unpleasantry able to be taken from that.

My sister ignored my pleas not to name my nephew Carter as I thought rhyming with farter it would be a nightmare.
He’s 10 now and has had no issues.

I just have a feeling that the kids in my school would have gone Reggie = Wedgie. Then again, in my experience of school, kids will find a way to use almost any name and turn it into something else not complimentary.

Keir; honestly, is this a joke?
To me many of these read as stereotypical "upper class Brit" names (with some normal names thrown in like Charles and Jude).

I'm American and still live in the US. I love Keir and Jasper. I've never heard of Rafe or Fergus. I hate Rupert, Otto, and Gus.

Magnus might be too similar to Magnum (a condom line).

Turned into what? Reggie is more likely to BE the bully 😂 (I joke)

I know twins called Ronnie and Reggie and they really do live up to their names

Rupert and Fergus are not usable in the US. Those are names that would be mocked.

If you travel a lot it might be worth saying the ones you like in a few different accents to see if you like how peers/teachers etc might say them in future.

Just as someone who had Gus on their shortlist, but had only recently moved to the north east. I love the local accent, but the 'u' sound is totally different to how we'd say it and ultimately led to it coming off the shortlist. I'm sure we'd have gotten used to it, but worth thinking about.

If you're ever likely to end up in Germany Otto is very much seen as an unpopular old man's name among people I know there (Hamburg, Munich and Berlin). Any J names would also need correcting in Germany and Spanish speaking countries. But we know people living there with J names and everyone adapts eventually 🤷🏼‍♀️

Magnus - different pronunciations
Reggie - 'j' sound not used in some countries
Fergus - ok
Ivor - not sure
Maximus - just call him Max
Otto - don't like it
Gus - ok but might sound
Hector - to hector
Jude - trendy and will be more so because of the World Cup
Romeo - no
Keir - too linked to one person
Rupert - no
Jasper - dog
Charles (nn Charlie) - like, might be Chuck in USA
Rafe - dreadful
Tobias - ok

American from Texas here

I think Maximus (although Maxwell is more common here), Jude, Romeo, Keir (although I would spell it Kier), Jasper, and Charles will be ok. Tobias is alright, but it feels slightly pretentious. Hector will be assumed to be Mexican (but there's honestly nothing wrong with that). Reggie is outdated. The other ones (Magnus, Fergus, Ivor, Otto, Gus, Rupert, and Rafe) are a little strange to me.

With the exception of Charles they are all quite stylised names that I’m not sure will travel that well (even within uk) eg Ivor is definitely a train! If travelling names are a major concern I’d choose classic names- I had the same issue and checked meaning is major languages too

Seriously Keir?

I like Jude and Romeo the rest are an absolute no

Charles and Max are your safest bets on that list. You’ve got a lot of US dog names on there.

I like Otto and Jude