Jeezer. In Joshua 17:2, Abiezer. Only this tribe, and Judah (Numbers 26:21) had great-grandsons as "heads". Compare Genesis 50:23.
Related Commentaries of Numbers 26:30
Numbers 26:30
30 These are the sons of Gilead: of Jeezer,h the family of the Jeezerites: of Helek, the family of the Helekites: