Coos

"(written Cos in the R.V.), a small island, one of the Sporades" "in the Aegean Sea, in the north-west of Rhodes, off the coast of" "Caria. Paul on his return from his third missionary journey," passed the night here after sailing from Miletus (Acts 21:1). It is now called Stanchio.

Definition of Coos:
"top, summit"