"Form of Essence"
The name Essynce is commonly a female name from the "American" origin.
Essynce is a phonetic respelling of Essence, the English word name taken from the ordinary noun for the core nature or quality of something. The y in place of the second e and the closing ce are spelling choices rather than changes in sound or meaning, so the two forms are pronounced alike. This kind of respelling of a dictionary-word name is a recognised pattern in late twentieth-century American given names.
Essence means "Aura, Nature".
The pronunciation of Essynce is ESS-uhns.