These were the men numbered by Moses and Aaron, with the assistance of the twelve leaders of Israel, each one representing his family.
KJV
These [are] those that were numbered, which Moses and Aaron numbered, and the princes of Israel, [being] twelve men: each one was for the house of his fathers.
ASV
These are they that were numbered, whom Moses and Aaron numbered, and the princes of Israel, being twelve men: they were each one for his fathers’ house.