Achish in Smiths Bible Dictionary
(angry), a Philistine king of Gath, who in the title of the
34th Psalm is called Abimelech. David twice found a refuge
with him when he fled from Saul. (B.C. 1061.) On the first
occasion he was alarmed for his safety, feigned madness, and
was sent away.
Read More about Achish in Smiths Bible Dictionary