This is the inheritance
nachalah (nakh-al-aw')
something inherited, i.e. (abstractly) occupancy, or (concretely) an heirloom; generally an estate, patrimony or portion -- heritage, to inherit, inheritance, possession.
of the children
ben (bane)
a son (as a builder of the family name), in the widest sense (of literal and figurative relationship, including grandson, subject, nation, quality or condition, etc.
of Gad
Gad (gawd)
Gad, a son of Jacob, including his tribe and its territory; also a prophet -- Gad.
after their families
mishpachah (mish-paw-khaw')
a family, i.e. circle of relatives; figuratively, a class (of persons), a species (of animals) or sort (of things); by extens. a tribe or people -- family, kind(-red).
the cities
`iyr (eer)
or (in the plural) par {awr}; or ayar (Judges 10:4) {aw-yar'}; a city (a place guarded by waking or a watch) in the widest sense (even of a mere encampment or post) -- Ai (from margin), city, court (from margin), town.
and their villages
chatser (khaw-tsare')
a yard (as inclosed by a fence); also a hamlet (as similarly surrounded with walls) -- court, tower, village.