The members of the family line of Gershon were given 13 towns. They received them family group by family group. Most of the towns were from the tribes of Issachar, Asher and Naphtali. The rest were from the other half of the tribe of Manasseh. It’s in Bashan.
The members of the family line of Merari were given 12 towns. They received them family group by family group. The towns were from the tribes of Reuben, Gad and Zebulun.
The family groups of Gershon were given 13 towns. Those towns were from the family groups of the tribes of Issachar, Asher and Naphtali and half of the tribe of Manasseh. That part of Manasseh was in the land of Bashan.