A male given name from Irish, popular in the US in the 1970s.
"My grandfather's birth certificate lists his name as Shawn, a style that was very common among American men born in the early seventies."
Shawn is an English variant of the Irish name Seán, which ultimately derives from the Hebrew phrase meaning "God is gracious." Like many other names in this family, including John and Ian, it entered English through French and Latin forms while retaining its original biblical significance.