Rayner 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.
Saintly namesake: Rainerius was a 12th-century Italian saint, revered as the patron of Pisa and Monaco. He is remembered for his piety and acts of charity. (June 17 · 12th century)
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