"Blend of Jo and Lynn"
The name Joellyn is commonly a female name from the "English" origin.
Joellyn is an English feminine name formed from Jo, a short form of Josephine or Joanna, together with the -lyn ending that appears in English girls' names such as Marilyn and Carolyn. The -ell- in the spelling also matches Joelle, the French feminine form of Joel, so the name can be read either as Jo plus Lynn written as one word or as Joelle carrying a -lyn ending.
The pronunciation of Joellyn is jo-EL-in.
