Related names:
Aquiles (Spanish)

Achilles was a Greek hero of the Trojan War and the central character and greatest warrior of Homer's Iliad. Achilles was said to be a demigod; his mother was the nymph Thetis, and his father, Peleus, was the king of the Myrmidons.Source:Wikipedia

More names for your cat:

Other cats named Achilles

If this is the name of your cat, upload a photo :)