Nicknames for Rainer
7 nicknames, sorted by where they actually get used.
Office-safe
Rain
formal
Playground-friendly
Rai
casual
Rainy
casual
Rainie
casual
Ray
casual
Raie
casual
Family nicknames
Raikins
endearment
About Rainer nicknames: Most parents pick Rainer 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.