C. F. Keil and Franz Delitzsch on Nehemiah 10:15-28

Neh 10:15-28 (Hebrew_Bible_10:16-29)

The heads of the people. Forty-four names, thirteen of which are found in the list (Ezra 2) of the kindreds who returned with Zerubbabel; see Ezra 2. The rest are names either of the heads of the different houses into which these kindreds were divided, or of the elders of the smaller towns of Benjamin and Judah. The fact that, while only thirty-three kindreds and placed are enumerated in Ezra 2, forty-four occur here, - although names of kindreds mentioned in Ezra 2, e.g., Shephatiah, Arah, Zaccai, etc., are wanting here, - is to be explained partly by the circumstance that these kindreds included several houses whose different heads all subscribed, and partly by fresh accessions during the course of years to the number of houses.  (Hebrew_Bible_10:30-33)

All the members of the community acceded to the agreement thus signed by the princes of the people, and the heads of the priests and Levites, and bound themselves by an oath to walk in the law of the Lord, and to separate themselves from the heathen.