"Blend of Shawn and ette"
The name Shawnette is commonly a female name from the "English" origin.
Shawnette is a twentieth-century American feminine name formed by adding the diminutive suffix -ette to Shawn. Shawn is the anglicized form of Irish Sean, itself the Irish form of John, and -ette is a French diminutive suffix that English had already used for centuries in feminine names such as Annette, Jeannette and Paulette. It is not an inherited Irish name form; the Irish feminine counterpart of Sean is Sinead.
The pronunciation of Shawnette is shaw-NET.