"Blend of Kaye and Lynn"
The name Kayelynn is commonly a female name from the "English" origin.
Kayelynn is a modern American formation built from two familiar name elements. The first is Kaye, an established English given name, and the second is Lynn, which has been used as a given name in English and as a second element in American girls' names since the early twentieth century. The name first appears in United States birth records in 1990, which fits a made-up combination rather than an older linguistic source. No meaning can be assigned to it beyond the two parts.
The pronunciation of Kayelynn is KAY-lin.