These are the 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).
of Manasseh
Mnashsheh  (men-ash-sheh')
causing to forget; Menashsheh, a grandson of Jacob, also the tribe descended from him, and its territory -- Manasseh.
and those that were numbered
paqad  (paw-kad')
to visit (with friendly or hostile intent); by analogy, to oversee, muster, charge, care for, miss, deposit, etc.
of them fifty
chamishshiym  (kham-ish-sheem')
fifty -- fifty.
and two
shnayim  (shen-ah'-yim)
two; also (as ordinal) twofold -- both, couple, double, second, twain, + twelfth, + twelve, + twenty (sixscore) thousand, twice, two.
'eleph  (eh'-lef)
hence (the ox's head being the first letter of the alphabet, and this eventually used as a numeral) a thousand -- thousand.
and seven
sheba`  (sheh'-bah)
a primitive cardinal number; seven (as the sacred full one); also (adverbially) seven times; by implication, a week; by extension, an indefinite number
me'ah  (may-aw')
a primitive numeral; a hundred; also as a multiplicative and a fraction -- hundred(-fold), -th), + sixscore.