Cyndy and Cyndi are diminutives of the feminine given name Cynthia.
about Cindy(from Wikipedia)
Cynthia is a feminine given name of Greek origin: Κυνθία, Kynthía, “from Mount Cynthus” on Delos island. It can be abbreviated as Cindi or as Cyndyi. There are various spellings for this name.
Cynthia was originally an epithet of the Greek goddess of the moon, Artemis, who according to legend, was born on Mount Cynthus. Selene, the Greek personification of the Moon, and the Roman Diana (by way of their identification with Artemis) were also sometimes called “Cynthia”.
about Cynthia(from Wikipedia)
[ Cindy ] Size:750*1334px