For boys names like Thomas/Tomos/Tomas, Adam, David, Joseph, Matthew, John and James and all their equivalents.
For girls names like Sophia/Sofia/Sophie, Elisabeth/Isabel/Isabella, Laura, Mary and Anna.
European royal names and biblical classics, especially ones which also feature in Islam and Judaism.
If you look at some of these names there is also a lot of variation in the UK.
So James is Iago in Welsh, Jago in Cornish and Seumas/Hamish in Scottish gaelic for example.