Shaelyn (ther most common spelling given to babies as of 2010) was the 439th most common name given to baby girls in 2010. It is a modern name, coined in the latter half of the 20th century based on the name Shea (Shae, Shay), an Irish surname used as a first name + the popular feminine suffix -lyn. See Also: Shealan, Shaylin, Chailyn, Shae-Lynne, Shea, Lynne