"Blend of Brenda and Lyn"
The name Brendalyn is commonly a female name from the "English" origin.
Brendalyn is a compound of the established given name Brenda with the ending Lyn, the same element found in names such as Marilyn and Rosalyn. It first appears in United States birth records in 1948, which is consistent with a modern American formed name rather than an older inherited one. No meaning beyond that of its two parts is recorded for it.
The pronunciation of Brendalyn is BREN-duh-lin.