Translation:Now, there are eight in your family.
Could this be translated simply as "Now, eight are in your family"?
8 people. This word is specific to counting people: the word "people" is implied. It basically means "An octet".
If counting doctors, or firemen, or nurses, or men or wormen, etc, then you specify the people's description in the genetive plural :
// Ochtar fear = 8 men. (=An octet of men)
// Ochtar man = 8 women. (=An octet of women)
(Or alternatively, if asking "How many lettuces", you can reply "Ochtar!" when counting things too... but not naming the thing.