"Blend of De and Lynn"
The name Delynn is commonly a female name from the "English" origin.
Delynn is a modern American formation built on Lynn, a productive element in early twentieth-century American girls' names such as Carolyn and Marilyn, with an initial De-. It first appears in United States birth records in 1931, which places it with the coined and blended names of that era rather than with older inherited names.
The pronunciation of Delynn is dih-LIN.