Responsa for Numbers 4:22

נָשֹׂ֗א אֶת־רֹ֛אשׁ בְּנֵ֥י גֵרְשׁ֖וֹן גַּם־הֵ֑ם לְבֵ֥ית אֲבֹתָ֖ם לְמִשְׁפְּחֹתָֽם׃

’Take the sum of the sons of Gershon also, by their fathers’ houses, by their families;