John Gill Commentary Nehemiah 11:17

"and Mattaniah the son of Mica, the son of Zabdi, the son of Asaph, who was the chief to begin the thanksgiving in prayer, and Bakbukiah, the second among his brethren; and Abda the son of Shammua, the son of Galal, the son of Jeduthun." — Nehemiah 11:17 (ASV)

And Mattaniah the son of Micha, the son of Zabdi, the son of
Asaph
Zabdi is called Zichri in (1 Chronicles 9:15)

was the principal to begin the thanksgiving in prayer :
he was the precentor, or led the song at the time of the daily sacrifice, in which prayer was also made, as in many of the songs, hymns, and psalms of David:

and Bakbukiah the second among his brethren ;
he was the next singer, or deputy to Mattaniah; perhaps the same that is called Bakbakkar, (1 Chronicles 9:15)

and Abda the son of Shammua ;
called Obadiah the son of Shemaiah, (1 Chronicles 9:16)

the son of Galal, the son of Jeduthun :
one of the three principal singers.