The Merarites, according to their families, were allotted twelve cities from the tribes of Reuben, Gad, and Zebulun.
Jewish Publication Society of America Version (JPS1917) - 1 Chronicles 6:63 >(6-48) Unto the sons of Merari were given by lot, according to their families, out of the tribe of Reuben, and out of the tribe of Gad, and out of the tribe of Zebulun, twelve cities.