John Gill Commentary Ezra 2:60

"the children of Delaiah, the children of Tobiah, the children of Nekoda, six hundred fifty and two." — Ezra 2:60 (ASV)

The children of Delaiah, the children of Tobiah, and the
children of Nekoda, six hundred fifty and two .
] These, though their immediate parents were known, yet by their being mentioned here, it seems as if they could not carry their genealogy further, and make it clearly appear what was the house of their fathers, or what their family.