I'm not quite sure what you're asking. Yes,
Madelyn and
Madeline are pronounced differently:
Madelyn is usually MAD-uh-lin whereas
Madeline is MAD-eh-lien or mad-eh-LEEN.
If you want a French name, you need to use the French spelling (
Madeline) with one of the two pronunciations listed for it (click link).
♦ Chrisell ♦
All we have to decide is what to do with the time that is given us. - J.R.R. Tolkien.