Psalms 45:1

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

Maskil : a literary or musical term

Psalms 56:1

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

Gath : a town of the Anakim and Philistines in Judah 12 km south. of Ekron
(31° 41´, 34° 50´)

Miktam : a literary or musical term (NIV margin)

Philistines : a sea people coming from Crete in 1200BC to the coast of Canaan
(33° 33´, 35° 21´)