What does Q’onoS mean? Example, Earth means dirt or land, it’s not some arbitrary word without a meaning of its own.
Qo’noS Kronos is just a name, it doesn’t mean anything to Klingons as far as we know, much like other Klingon names in Star Trek (Worf, Martok, Gowron, Kruge, Gorkon, etc). They are just collections of sounds that the episode writers liked.
The Earth word Kronos has a ton of meanings: https://en.wikipedia.org/wiki/Kronos