Revelation 9:11

9:11 They have over them as king the angel of the abyss. His name in Hebrew is "Abaddon,"{"Abaddon" is a Hebrew word that means ruin, destruction, or the place of destruction} but in Greek, he has the name "Apollyon."{"Apollyon" means "Destroyer."}
-World English Bible

Other Translation

9:11 And they had a king over them, [which is] the angel of the bottomless pit, whose name in the Hebrew tongue [is] Abaddon, but in the Greek tongue hath [his] name Apollyon.
-King James Version