The addition אחרנים, last (comp. 2 Samuel 19:12), is thus explained by J. H. Mich.: respectu eorum qui primum cum Zorobabele sub Cyro in patriam redierunt c. ii. 13. Bertheau, however, considers this explanation untenable, because אחרנים stands in the present series only with the sons of Adonikam, while it is nevertheless certain, that many families belonging also to other races than this had returned with Zerubbabel, in comparison with whom all who returned with Ezra might be called last. This reason, however, is not conclusive; for in Ezra 8:13 the further statement also differs, both in form and matter, from those in the former verses. Here, instead of the name of the head of the house, we read the words "last, and these their names;" whereupon three names are given, and not till then וגו ועמּהם, "and with them sixty males." Here, then, it is not the head of the house who is named, but in his place three heads of families, amounting together to sixty males. Now, as these three families did not form a house, these sixty sons of Adonikam who returned with Ezra are, with regard to the six hundred and sixty-six sons of Adonikam who returned with Zerubbabel, designated the last, or last arrived, and thus comprised with them as one house.

Ezra 8:19 Parallel Commentaries

Hashabiah

Nehemiah 3:17 After him repaired the Levites, Rehum the son of Bani. Next to him repaired Hashabiah, the ruler of the half part of Keilah...

Nehemiah 10:11 Micha, Rehob, Hashabiah,

Merari

1 Chronicles 6:1,16,19 The sons of Levi; Gershon, Kohath, and Merari...