And Jordan
Yarden  (yar-dane')
a descender; Jarden, the principal river of Palestine -- Jordan.
was the border
gabal  (gaw-bal')
to twist as a rope; to bound (as by a line) -- be border, set (bounds about).
of it on the east
qedem  (keh'-dem)
the front, of place (absolutely, the fore part, relatively the East) or time (antiquity); often used adverbially (before, anciently, eastward)
pe'ah  (pay-aw')
mouth in a figurative sense, i.e. direction, region, extremity -- corner, end, quarter, side.
This was 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 Benjamin
Binyamiyn  (bin-yaw-mene')
son of (the) right hand; Binjamin, youngest son of Jacob; also the tribe descended from him, and its territory -- Benjamin.
by the coasts
gbuwlah  (gheb-oo-law')
a boundary, region -- border, bound, coast, landmark. place.
thereof round about
cabiyb  (saw-beeb')
(as noun) a circle, neighbour, or environs; but chiefly (as adverb, with or without preposition) around -- (place, round) about, circuit, compass, on every side.
according to 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).