| Meaning | counseling warrior, judgment army |
| Origin | German |
| Gender | Boy |
| Popularity | Moderate |
| Length | 6 |
| Syllables | 2 |
| Syllabification | Rai-ner |
Sophisticated and somewhat uncommon, Rainer brings European flair to English-speaking contexts. This name carries an intellectual quality, suggesting depth and contemplation. The pronunciation remains straightforward despite potential unfamiliarity in some regions, making it accessible yet distinctive. Rainer ages beautifully, working equally well for children and adults, from playground to boardroom. The name evokes natural imagery while maintaining urban sophistication, appealing to diverse aesthetic preferences. Parents choosing Rainer often value culture, travel, and international perspectives, wanting a name that reflects these interests. The 'ai' vowel combination creates a pleasing sound that's neither too soft nor too harsh. Rainer suggests someone thoughtful, creative, and independent—qualities many parents hope to encourage in their children. This selection demonstrates naming confidence, showing willingness to explore beyond typical choices while maintaining classic name structure and wearability.
| Rain |
| Raine |
| Ray |
| Rainy |
| Rainer Maria Rilke | Renowned Austrian poet and novelist |
| Rainer Werner Fassbinder | Influential German film director |
| Rainer Schüttler | Former professional tennis player from Germany |
| Rainer Bonhof | Retired German footballer and coach |
| Rainer Weiss | Nobel Prize-winning physicist for his work on gravitational waves |
| Rainer Maria Latzke | German painter and muralist |
| Rainer Brüderle | German politician and former Minister of Economics |
| Rainer Adrion | Former German footballer and coach |
| Rainer Höß | Grandson of Rudolf Höß, the commandant of Auschwitz concentration camp |
| Rainer Hunold | German actor and voice actor |
| Rainer Chapman | Character from the video game "Lisa - The Painful RPG" |
| Rainer Nold | Character from the anime and manga series "Mobile Suit Gundam" |
| Rainer Sinclair | Character from the TV show "Dexter" |
| Rainer Becker | Character from the video game "Professor Layton and the Unwound Future" |
| Rainer Kirschbaum | Character from the movie "A Cure for Wellness" |
| Rainer Trampe | Character from the novel "Buddenbrooks" by Thomas Mann |
| Rainer Layer | Character from the movie "Inglourious Basterds" |
| Rainer Schulz | Character from the video game "Steins;Gate 0" |
| Rainer Winkler | Character from the movie "The Lives of Others" |
| Rainer | Character from the webcomic "Paranatural" |