The region of Tappuah belonged to Manasseh, but Tappuah itself, on the border of Manasseh, belonged to Ephraim.
Jewish Publication Society of America Version (JPS1917) - Joshua 17:8 >The land of Tappuah belonged to Manasseh; but Tappuah on the border of Manasseh belonged to the children of Ephraim. —