Quick answer
Onyx is a boy/girl name.
Pronunciation: American English /ˈɑn.ɪks/; British English /ˈɒn.ɪks/.
Meaning and history
This name comes from the English word for the gemstone (a variety of chalcedony), which can be black, red or other colours. It is derived from Greek ὄνυξ (onyx) meaning "claw, nail".
Notes and context
Usage: english