"Blend of Wes and Lynn"
The name Weslynn is commonly a female name from the "American" origin.
Weslynn is a modern American blend, joining the Wes- element of Wesley with the -lynn ending that appears in American feminine names such as Raelynn and Gracelynn. Its first appearance in United States birth records, in 2008, is consistent with that kind of recent formation rather than with an inherited name from a documented naming tradition. No earlier use of the name is recorded.
The pronunciation of Weslynn is WES-lin.