"Blend of Jae and Lynn"
The name Jaelynn is commonly a female name from the "American" origin.
Jaelynn is a modern American formation built from two elements: Jae, a spelling of the name Jay, and the ending Lynn, which recurs as a second element in American girls' names coined in the later twentieth century. The combined name has no meaning beyond those parts, and it is not an established name in a documented language or naming tradition.
The pronunciation of Jaelynn is JAY-lin.