John Gill Commentary Nehemiah 3:12

"And next unto him repaired Shallum the son of Hallohesh, the ruler of half the district of Jerusalem, he and his daughters." — Nehemiah 3:12 (ASV)

And next unto him repaired Shallum, the son of Hallohesh
So called, as Ben Melech says, from his being an enchanter of serpents, or a wise prudent counsellor:

the ruler of the half part of Jerusalem ;
of the other half; see (Nehemiah 3:9)

he and his daughters ;
who were rich widows or heiresses, and employed men to build at their own expense; he seems to have had no sons.