"Blend of Shai and Lynn"
The name Shailynn is commonly a female name from the "American" origin.
Shailynn is a modern American formation built from the element Shai, also spelled Shay, combined with the ending -lynn, the suffix found in names such as Kaylynn and Raelynn. The name first appears in United States birth records in 1988, and its shape is consistent with late twentieth-century American coinage rather than an older established name.
The pronunciation of Shailynn is SHAY-lin.