17:6 for the daughters of Manasseh were assigned land among his sons. The land of Gilead belonged to the rest of the descendants of Manasseh.
Joshua 17:3
17:3 Now Zelophehad son of Hepher, son of Gilead, son of Makir, son of Manasseh, had no sons, only daughters. These are the names of his daughters: Mahlah, Noah, Hoglah, Milcah, and Tirzah.