I always want to pronounce
Madeline with the -lyn ending and
Madeleine with the -line ending. Probably because of the book/cartoon '
Madeleine', which I loved as a kid and because most Madelines that I know have used the -lyn ending.
I think both
Madeline and
Madeleine are beautiful names. Unfortunately, I hate the nickname
Maddie and the various butchered spellings of the name have turned me off it.
I know a few. I went to school with a
Madeline and a Madaline. Working in schools, there were so many Maddies, of both the
Madeline /
Madelyn and
Madison varieties.
It's a fairly common name among college students that I teach in the Southern US (aged 18-22)