Sallu: The variation of סלו [Strong's H5543], Sallu, and סלי [Strong's H5543], Sallai, is simply caused by the mutation of ו, wav and י, yood. Neh 12:20, Sallai
the chief: "The chief of the priests" seem to have been the heads of the courses established by David. 1Ch 24:18
of Jeshua: Neh 12:1, Ezr 3:2, Hag 1:1, Zec 3:1
Reciprocal: Neh 7:7 - Zerubbabel Mat 2:4 - the chief Mat 16:21 - chief priests