Nicknames for Onassis
10 nicknames, sorted by where they actually get used.
Office-safe
Ona
formal
Onas
formal
Sis
formal
Playground-friendly
Onasy
casual
Onasie
casual
Sisy
casual
Sisie
casual
Ony
casual
Onie
casual
Family nicknames
Onakins
endearment
About Onassis nicknames: Most parents pick Onassis for the full formal sound. Then they reach for a shorter form at home. The office version and the playground version are usually different — that's the split above.