Brown Driver Briggs

 Binnui = "built up"
1. an exile returnee with Zerubbabel, son of Henadad, who assisted at
the reparation of the wall of Jerusalem, under Nehemiah
2. a Levite in time of Ezra, father of Noadiah
3. another Levite in time of Ezra, who took a foreign wife
4. still another Levite in time of Ezra, who took a foreign wife