John Gill's Bible Commentary Ver. 9. And the coast descended unto the river Kanah, southward of the river , etc.] The same mentioned in the account of the coast of Ephraim, ( Joshua 16:8); which was north of that river, as Manasseh was to the south of it: these cities of Ephraim [are] among the cities of Manasseh ; that is, the cities before mentioned, Asher, Michmethah, Entappuah, and Tappuah; though they were in the tribe of Manasseh, yet they were inhabited by the Ephraimites: the coast of Manasseh also [was] on the north side of the river ; of the river Kanah, as well as on the south of it; it had cities there, though possessed by the tribe of Ephraim: and the outgoings of it were at the sea ; the Mediterranean sea.
Matthew Henry Commentary
Verses 7-13 - There was great communication between Manasseh and Ephraim. Though eac tribe had its inheritance, yet they should intermix one with another to do good offices one to another, as became those, who, though of different tribes, were all one Israel, and were bound to love a brethren. But they suffered the Canaanites to live among them, agains the command of God, to serve their own ends.
Original Hebrew וירד3381 הגבול1366 נחל5158 קנה7071 נגבה5045 לנחל5158 ערים5892 האלה428 לאפרים669 בתוך8432 ערי5892 מנשׁה4519 וגבול1366 מנשׁה4519 מצפון6828 לנחל5158 ויהי1961 תצאתיו8444 הימה׃3220