"Blend of Josh and -lyn"
The name Joshlyn is commonly a female name from the "English" origin.
Joshlyn is a modern American formation, first appearing in United States birth records in 1951. Its form reads as a joining of the male name Josh, a short form of Joshua, with the feminine ending -lyn, which recurs in American girls' names of the twentieth century. No earlier use of this spelling in a documented naming tradition is recorded.
The pronunciation of Joshlyn is JOSH-lin.