1 Samuel 27:12

Achish : the king of Gath in David's time,the king of Gath in Solomon's time

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

Israel : a citizen of Israel.,a member of the nation of Israel

1 Samuel 31:1

Gilboa : a mountain or plateau between Jezreel and the Jordan River (OS)
(32° 30´, 35° 24´)

Israel : a citizen of Israel.,a member of the nation of Israel

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