"Form of Sincere"
The name Cincere is commonly a unisex name from the "American" origin.
Cincere is a respelled form of Sincere, an English word name taken from the adjective sincere. The C spelling appears in United States birth records from 1999, while Sincere is recorded earlier. The English adjective derives from Latin sincerus.
Sincere means "Honest".
The pronunciation of Cincere is sin-SEER.