No. It's a modern combination of the popular elements of Shay- + -Lyn. Shea/Shay is an Anglized version of the Irish name Séaghdha, but just adding the English -lynn to an Irish name doesn't mean it's still Irish.
Jaylin is a modern name that is a combination of "Jay" and "Lynn." "Jay" can mean "jaybird" or "victory," while "Lynn" means "lake" or "waterfall." Therefore, Jaylin can be interpreted as a name representing victory or strength associated with the elements of nature.
A good middle name for Lynn could be Marie, Elizabeth, or Grace.
Shea Ross speaks English.
Shea butter is called "เคถเฅ เคฌเคเคฐ" (shee butter) in Hindi.
Bailey means "bailiff," and Lynn is said to mean "waterfall."
Beth Shea's birth name is Elizabeth Ann Shea.
Gloria Shea's birth name is Shea, Olive Gloria.
Luke Shea's birth name is Luke Patrick Shea.
Marty Shea's birth name is Martin Christopher Shea.
McKenzie Shea's birth name is McKenzie Shea Walsh.
Shorty Shea's birth name is Donald Jerome Shea.
Specs Shea's birth name is Francis Joseph Shea.
Shea Hillenbrand's birth name is Shea Matthew Hillenbrand.
Jerry Shea's birth name is Jerry Ray Shea.
Siomon Shea's birth name is Blakeston Presley Shea.
Shea Ackerly's birth name is Shea Erron Ackerly.