Here "house" represents descendants. Manasseh and Ephraim were sons of Joseph, and the "house of Joseph" can refer to the descendants of Manasseh and Ephraim. Alternate translation: "The descendants of Manasseh and Ephraim" or "The men of the tribes of Manasseh and Ephraim" (See: [[rc://en/ta/man/translate/figs-metonymy]])