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 Bigvai
Bigvay (big-vah'ee)
Bigvai, an Israelite -- Bigvai.
two 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.
fifty
chamishshiym (kham-ish-sheem')
fifty -- fifty.
and six
shesh (shaysh)
six (as an overplus (see 7797) beyond five or the fingers of the hand); as ord. sixth -- six(-teen, -teenth), sixth.