30 These were the descendants of Gilead: through Iezer, the Iezerite clan; through Helek, the Helekite clan;

Read Numbers 26:30 Using Other Translations

These are the sons of Gilead: of Jeezer, the family of the Jeezerites: of Helek, the family of the Helekites:
These are the sons of Gilead: of Iezer, the clan of the Iezerites; of Helek, the clan of the Helekites;
These were the subclans descended from the Gileadites: The Iezerites, named after their ancestor Iezer. The Helekites, named after their ancestor Helek.