Rainer is a ♂ boy name.
Rainer is a name of Old High German origin (originally Raganhar).
Rainer means “advice of the army” or “army counsel” ( (from Old High German “ragin” = advice + “heri” = army/warrior).
Based on the frequency of positive ratings, we can analyze how popular names are in different countries. The name Rainer is currently ranked #4771 on the name leaderboard.
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