Meaning

verb assert or affirm strongly; state to be true or existing

noun an assertion of a right (as to money or property)

verb demand as being one's due or property; assert one's right or title to

originFrom Middle English claimen, borrowed from Old French clamer (“to call, name, send for”), from Latin clāmō, clāmāre (“to call, cry out”), from Proto-Italic *klāmāō, from Proto-Indo-European *kelh₁- (“to shout”), which is imitative. See also Lithuanian kalba (“language”), Old English hlōwan (“to low, make a noise like a cow”), Old High German halan (“to call”), Ancient Greek καλέω (kaléō, “to…

Etymology from Wiktionary, CC BY-SA 3.0