What is the meaning of Jess?

A short strap fastened around the leg of a bird used in falconry, to which a leash may be fastened.

To fasten a strap around the leg of a hawk.

Alternative form of jet (the mineral).

Alternative form of jet (the color).

Pronunciation spelling of just.

alternative form of jes

yes (exclamation of satisfaction, joy, etc.)

Source: wiktionary.org