1 Chronicles 6:33

Joel : a son of Pethuel and a prophet to Judah,son of Samuel of Kohath son of Levi,head of a large influential family of Simeon in King Hezekiah's time,a powerful leader among the descendants of Reuben,a chief of the tribe of Gad,son of Azariah (Uzziah) of Kohath; one of the Levites that King Hezekiah assigned to supervise the cleansing of the temple,son of Izrahiah of Issachar,brother of Nathan; one of David's military elite,a Levitical chief of the descendants of Ladan under King David,son of Ladan and temple treasurer under King David,son of Pedaiah; David's chief officer over the tribe of Manasseh,a man who put away his heathen wife; an Israelite descended from Nebo,a man who lived in Jerusalem in Nehemiah's time; son of Zichri,son of Pethuel; a prophet who wrote the book of Joel

Kohathites : members of the clan of Kohath of Levi

Samuel : son of Ammihud; Moses' land distribution deputy for Simeon,son of Tola son of Issachar

1 Chronicles 6:39

Asaph : father of Joah, Hezekiah's recorder,son of Berechiah the Levite; music minister under David,father of Zichri; a Levite ancestor of some returnees,an official over the (Persian) king's forest in Judah

Berechiah : son of Meshullam; a descendant of Jehoiachin, king of Judah,son of Shimea (Levi); father of Asaph, David's song leader,son of Asa; a Levite who led his clan back from exile,a Levite porter for the ark in David's time,son of Meshillemoth, a man of Ephraim in the time of Pekah 741 BC (YC),son of Meshezabel; father of Meshullam a wall repairman,son of Iddo; father of Zechariah the prophet

Shimea : son of Jesse; David's brother,son of David and Bathsheba,son of Michael, of Gershom of Levi; ancestor of Asaph,son of Jesse (Judah); father of Jonathan who killed a giant

1 Chronicles 25:6

Asaph : father of Joah, Hezekiah's recorder,son of Berechiah the Levite; music minister under David,father of Zichri; a Levite ancestor of some returnees,an official over the (Persian) king's forest in Judah

Jeduthun : a Levite whose descendants returned from exile

Psalms 50:1

Asaph : father of Joah, Hezekiah's recorder,son of Berechiah the Levite; music minister under David,father of Zichri; a Levite ancestor of some returnees,an official over the (Persian) king's forest in Judah

Psalms 62:1

David : a son of Jesse of Judah; king of Israel,son of Jesse of Judah; king of Israel

Jeduthun : a Levite whose descendants returned from exile

Psalms 88:1

Ezrahite : a descendant of Ezrah

Korah : a man who led a rebellion against Moses and Aaron.,son of Esau and Oholibamah,son of Eliphaz son of Esau,son of Izhar son of Kohath son of Levi,son of Hebron of Judah,son of Izhar (Amminadab) son of Kohath son of Levi

Leannoth : possibly a tune: 'The Suffering of Affliction' (NIV marg)

Mahalath : daughter of Ishmael; wife of her cousin Esau,grand-daughter of David; wife of Rehoboam,a musical term (perhaps 'a sad tone' NASB marg.)

Maskil : a literary or musical term