Matthew Henry on Ezra 2:1-35
We may observe here, 1. That an account was kept in writing of the families that came up out of captivity, and the numbers of each family. This was done for their honour, as part of their recompence for their faith and courage, their confidence in God and their affection to their own land, and to stir up others to follow their good example. Those that honour God he will thus honour. The names of all those Israelites indeed that accept the offer of deliverance by Christ shall be found, to their honour, in a more sacred record than this, even in the Lamb's book of life. The account that was kept of the families that came up from the captivity was intended also for the benefit of posterity, tha…
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children of Arah, seven hundred seventy and five--The number is stated in Neh 7:10 to have been only six hundred fifty-two. It is probable that all mentioned as belonging to this family repaired to the general place of rendezvous, or had enrolled their names at first as intending to go; but in the interval of preparation, some died, others were prevented by sickness or insurmountable obstacles, so that ultimately no more than six hundred fifty-two came to Jerusalem.
Adam Clarke on Ezra 2:3
The children of Parosh - Where the word children is found in this table, prefixed to the name of a man, it signifies the descendants of that person, as from Ezra 2:3-21. Where it is found prefixed to a place, town, etc., it signifies the inhabitants of that place, as from Ezr 2:21-35.
John Gill on Ezra 2:3
The children of Parosh, two thousand an hundred and seventy two. From hence, to the end of Ezra 2:35, a list is given of the captives that returned, described by the families they were of, their ancestors from whence they sprung, or the towns and cities to which they originally belonged, and by their numbers; otherwise nothing more of them is known.
Keil & Delitzsch