[This] was the lot for the tribe of Manasseh; for he was the firstborn of Joseph. As for Machir the firstborn of Manasseh, the father of Gilead, because he was a man of war, therefore he had Gilead and Bashan.
"Gilead ..." This was primarily the name of a fertile district east of the Jordan river, but here it appears as a man's name.  Such double uses of names is universal.  There are a number of persons named `Dallas.'