| Meaning | wise army, counselor |
| Origin | German |
| Gender | gender neutral |
| Opposite gender | Rainier |
| Popularity | Moderate |
| Length | 7 |
| Syllables | 3 |
| Syllabification | Rain-i-er |
Rainier evokes grandeur and natural majesty, immediately calling to mind towering peaks and pristine wilderness. This name carries sophistication and refinement, having served historically as both a given name and a mark of distinction. The French-influenced pronunciation adds an element of elegance and worldliness, suggesting cultural awareness and appreciation for international influences. Rainier feels substantial without being heavy, offering three syllables of flowing sound that create an almost musical quality. Parents who choose Rainier often value nature, adventure, and the outdoors, while also appreciating names with historical weight and classical appeal. The name transitions beautifully from childhood through adulthood, never feeling inappropriate for any age or stage. Rainier maintains enough familiarity to be recognizable while remaining uncommon enough to feel special and distinctive. It pairs particularly well with simpler middle names, allowing the first name to shine without creating an overly complex combination.
| Renier |
| Reynier |
| Raineer |
| Raineir |
| Rainyere |
| Reinyere |
| Rainer |
| Rainere |
| Reinier |
| Reinere |
| Raynier |
| Rain |
| Rai |
| Nier |
| Rainy |
| Rainier III of Monaco | Prince of Monaco |
| Rainier Baas | Dutch racing driver |
| Rainier Hoenmans | Belgian actor |
| Rainier de Graaf | Dutch architect |
| Rainier Maria Rilke | Austrian poet |
| Rainier Landfermann | German musician |
| Rainier Ehrhardt | German photographer |
| Rainier Scheer | Dutch footballer |
| Rainier Luftfahrt Holding | Swiss aviation company |
| Rainier Fassmann | Austrian historian |
| Rainier Lucien | From "The Rainier Lucien Chronicles" |
| Rainier Stark | From "The Rainier Stark Mysteries" |
| Rainier Blackwood | From "The Chronicles of Rainier Blackwood" |
| Rainier Hart | From "Rainier Hart and the Enchanted Realm" |
| Rainier Darrow | From "The Rainier Darrow Conspiracy" |
| Rainier Graves | From "Rainier Graves - Monster Hunter" |
| Rainier Thorn | From "Rainier Thorn and the Lost Amulet" |
| Rainier Locke | From "Rainier Locke - Space Explorer" |
| Rainier Grey | From "The Adventures of Rainier Grey" |
| Rainier Stone | From "Rainier Stone - Time Traveler" |
| Rainier Nightshade | From "The Rainier Nightshade Chronicles" |
| Rainier Falconer | From "Rainier Falconer and the Quest for Destiny" |
| Rainier Drake | From "Rainier Drake - Sorcerer's Apprentice" |
| Rainier Blaze | From "The Rainier Blaze Adventures" |
| Rainier Swift | From "Rainier Swift and the Secret Society" |
| Rainier Frost | From "Rainier Frost - Realm Walker" |
| Rainier Vale | From "The Legend of Rainier Vale" |
| Rainier Wraith | From "Rainier Wraith - Demon Hunter" |
| Rainier Silver | From "Rainier Silver and the Cursed Relic" |
| Rainier Storm | From "The Rainier Storm Chronicles" |