John Gill Commentary Nehemiah 3:11

"Malchijah the son of Harim, and Hasshub the son of Pahath-moab, repaired another portion, and the tower of the furnaces." — Nehemiah 3:11 (ASV)

Malchijah the son of Harim, and Hashub the son of Pahathmoab ,
&c.] The fathers of these were heads of families that came out of captivity with Zerubbabel, (Ezra 2:6Ezra 2:32)

repaired the other piece :
or second piece, below and next to that which Hattush repaired, the last builder mentioned:

and the tower of the furnaces ;
near to which were furnaces for the baking of bread, or of bricks.