Older forms of English kept Latin’s gender-specific suffixes -tor and -trix; tor is for men and trix is for women. So a male pilot is an aviator, a female pilot is an aviatrix. A male fighter is a gladiator, a female fighter is a gladiatrix.
This contrasts with the modern system, where tor is for both men and women, and trix are for kids.
DarkestElemental616 