"Blend of Shea and Lynn"
The name Shealynn is commonly a female name.
Shealynn is best explained as an American blend of the name elements Shea and Lynn, spelled so that the two overlap on the letter l. Shea is an Irish surname that is also used as a given name, and Lynn is a separate given name element that appears in a number of American girls' names. The name first appears in United States birth records in 1979, which fits a modern blended formation rather than an inherited traditional name.
The pronunciation of Shealynn is SHAY-lin.