"Blend of Jo and Lyn"
The name Joelyn is commonly a female name from the "English" origin.
Joelyn is best explained as a twentieth-century American blend of the short form Jo, used for Josephine or Joanna, with the -lyn ending that also appears in names such as Marilyn and Carolyn. The first US birth record for Joelyn is in 1931, which fits a formation of this kind rather than an inherited name from an older naming tradition.
The pronunciation of Joelyn is JOH-lin.
