Quick answer
Artaxerxes is a boy name meaning "reign through truth".
Meaning and history
Greek form of the Old Persian name 𐎠𐎼𐎫𐎧𐏁𐏂𐎠 (Artaxšaça) meaning "reign through truth", derived from 𐎠𐎼𐎫 (arta) meaning "truth" and 𐎧𐏁𐏂𐎶 (xšaçam) meaning "reign, kingdom". This was the name of several Achaemenid Persian rulers. It was also borne by the founder of the Sasanian Empire, usually known by the Middle Persian form Ardashir.
Notes and context
Usage: old persian, biblical, history | Old Persian: 𐎠𐎼𐎫𐎧𐏁𐏂𐎠; Ancient Greek: Ἀρταξέρξης