"Blend of Ry and Lynn"
The name Rylyn is commonly a unisex name.
Rylyn is a modern American formation that joins the Ry- element found in names such as Ryan and Riley to the -lyn ending found in names such as Kaylyn and Braelyn. It first appears in United States birth records in 1998, which fits a late twentieth century coinage rather than an inherited name.
The pronunciation of Rylyn is RYE-lin.