Albert Barnes Commentary Judges 15:17

"And it came to pass, when he had made an end of speaking, that he cast away the jawbone out of his hand; and that place was called Ramath-lehi." — Judges 15:17 (ASV)

Ramath-lehi - Either the “height or hill of Lehi,” or, “of the jaw-bone;” or, as in the margin, “the casting away of the jaw-bone,” with allusion to Samson casting it out of his hand, when he had finished his war-song.