"Blend of Bree and Lynn"
The name Breelynn is commonly a female name from the "American" origin.
Breelynn is a modern American formation that joins the given name Bree with the second element Lynn, the same pattern seen in names such as Kaylynn and Ashlynn. The earliest United States birth records for it date to 1998, which fits a late twentieth-century coinage rather than an inherited name from an older tradition.
The pronunciation of Breelynn is BREE-lin.