Joshua 21:40

All these were the cities of the children of Merari according to their families, even the rest of the families of the Levites; and their lot was twelve cities.

All twelve cities were allotted to the clans of Merari’s descendants, the remaining Levite clans.

As for the cities of the several Merarite clans, that is, the remainder of the clans of the Levites, those allotted to them were in all twelve cities.

So all the cities for the children of Merari by their families, which were remaining of the families of the Levites, were by their lot twelve cities.

All these were the cities of the sons of Merari according to their families, the rest of the families of the Levites; and their lot was twelve cities.

The total number of towns allotted to the Merarite clans, who were the rest of the Levites, came to twelve.

So all the cities for the children of Merari according to their families, the rest of the families of the Levites, were by their lot twelve cities.

So in all, twelve towns were allotted to the clan of Merari.