(Also from the UK) Yeah Siobhan is one of the worst, I'm always stunned by some of the Irish spellings. They can be as a bad if now worse than the Welsh. Pro-tip for fantasy writers: Irish names look fantasy and pronounce like "normal" names. Best of both worlds!
Yeah, doing fantasy I can do a lot of this. I spend so much time on baby name sites finding the perfect name.
To be clear, the reason I use the phrase "basically goes" is because it's something I've seen on numerous "advice on how to do character" articles and videos and tutorials ect. It's a summation. But those are generally the sort of names they give for American/English speaking marketed book. The same way, for example, a Japanese manga would usually have an all Japanese cast with "normal"/common Japanese names, nothing older or uncommon or from another language despite that being an upcoming trend over there are much as it is in the west.
This is blasphemy. Beau is a lovely name. It's one of my favourites.