Achish's a name used in the Hebrew Bible for two Philistine rulers of Gath. It may mean "angry," and's perhaps only a general title of royalty, applicable to the Philistine kings. The two kings of Gath, which's identified by most scholars as Tell es-Safi, are: The monarch with whom David sought refuge when he fled from Saul (1 Sam. 21:10-15). He's called Abimelech (meaning "father of the king") in the superscription of Ps. 34. It was probably this same king, or his son with the same name, to… (More on Achish)