"Blend"
The name Reilynn is commonly a female name.
Reilynn is a modern American formation built on the ending -lynn, the second element taken from the name Lynn and used as a productive closing element in American girls' names such as Raelynn, Adalynn and Kaylynn. It first appears in United States birth records in 2004, which fits a recent coinage rather than an inherited name. The opening element is not documented, so no meaning can be assigned to the name in any language.
The pronunciation of Reilynn is RAY-lin.