en_tn/exo/01/06.md

all his brothers

This includes 10 older brothers and 1 younger brother.

were fruitful

The birth of children to the Israelites is spoken of as if they were plants that were producing fruit. AT: "had many children" or "gave birth to many children" (See: rc://en/ta/man/translate/figs-metaphor)

the land was filled with them

This can be stated in active form. AT: "They filled the land" (See: rc://en/ta/man/translate/figs-activepassive)

with them

The word "them" refers to the Israelites.