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 the Reubenites
R'uwbeniy (reh-oob-ay-nee')
a Reubenite or descendant of Reuben -- children of Reuben, Reubenites.
and they 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 were forty
'arba`iym (ar-baw-eem')
forty -- forty.
and three
shalowsh (shaw-loshe')
masculine shlowshah {shel-o-shaw'}; or shloshah {shel-o-shaw'}; a primitive number; three; occasionally (ordinal) third, or (multipl.) thrice
thousand
'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
hundred
me'ah (may-aw')
a primitive numeral; a hundred; also as a multiplicative and a fraction -- hundred(-fold), -th), + sixscore.
and thirty
shlowshiym (shel-o-sheem')
thirty; or (ordinal) thirtieth -- thirty, thirtieth.
