This is a gentilic adjective (with the definite article) functioning as a collective noun, referring to the Shaulite clan descended from Shaul within the tribe of Simeon. It appears in Numbers 26:13 in the wilderness census, where Israelite families are enumerated. The form follows standard patterns for clan designation, deriving from the ancestor's name with the -ite ending. The article makes it collective: 'the Shaulites' as a group.