Rainer

German form of RAYNER.

RAYNER   male   English (Archaic)
From the Germanic name Raganhar, composed of the elements ragin "advice" and hari "army". The Normans brought this name to England where it came into general use, though it was rare by the end of the Middle Ages.
EQUIVALENTS
ANCIENT GERMANIC: Raganhar, Rainer, Reiner
ANCIENT SCANDINAVIAN: Ragnarr
DANISH: Ragnar
DUTCH: Reinier
ENGLISH: Rayner
FRENCH: Rainier
GERMAN: Rainer, Reiner
ITALIAN: Raniero
LIMBURGISH: Reneer
NORWEGIAN: Ragnar
SPANISH: Rainerio
SWEDISH: Ragnar
DIMINUTIVES AND SHORT FORMS
ESTONIAN: Rain
ITALIAN: Nero
LIMBURGISH: Neer