Re: Christian names
"[...] would choose the Saint's name from a calendar based on the child's birth date [...]"
A friend from Sweden gets two "birthdays". One for the day she was born - and one for her name's calendar "name" day. Pity the child named for being born on their particular name day.
Was the origin of the custom in fact to name a child for the calendar's name day to avoid too many local duplicates?