Probably for Shashay; Sheshai, a Canaanite -- Sheshai.
see HEBREW Shashay
H8344. Sheshay
שֵׁשַׁי proper name, masculine a son of Anak (Aramaic form, compare GFMJu); — Numbers 13:22; Joshua 15:14 (both J E), Judges 1:10; Σες(ς)ει, Σουσαι, Σουσει.
שִׁשִּׁית שִׁשִּׁים, שִׁשִּׁי, see שֵׁשׁ below שׁדשׁ.