Kiki is a female Greek name deriving from the name Kiriaki. Kiki is the most common diminutive of Kiriaki, and used to be quite common in the past, when Greek women were using nicknames and diminutives. Today it is not that much in use.
Sound of name Kiki: Kee-keé
Male Version of Kiki: N/A
Nameday of Kiki: July 7th
Origin of name Kiki – Agia Kiriaki
Since Kiki derives from the name Kiriaki, being its most common diminutive, it is also associated with Agia Kiriaki. You can read all the pertinent information at the post for name Kiriaki.