John Gill Commentary Joshua 16:4

"And the children of Joseph, Manasseh and Ephraim, took their inheritance." — Joshua 16:4 (ASV)

So the children of Joseph, Manasseh and Ephraim, took their
inheritance .
] As it fell to them by the lot; by Manasseh is meant the half tribe of Manasseh, one half of that tribe having been settled by Moses on the other side Jordan; and next follows an account of the borders of the inheritance of Ephraim in particular, as that of the half tribe of Manasseh is given in (Joshua 17:1–18) .