Doesn't it make your head spin, I get myself so confused at times I don't know who's who. It's almost like they had a list that they could choose from...................

Well, they had a list, unless they were very strong-minded!
They had to please two sets of parents, and probably some god-parenting siblings as well.
Not to mention the rest of the families saying "what sort of a name is BLANCHE?" "what do you mean - you're calling him Michael - never been a Michael in our family".
And in Catholic families, it had to be a saint's name until the 1960s - so you had priests saying "you can't just call her Deirdre, I'll baptise her Mary after your mother"