Diminutive of Arnold, from Germanic 'arn' (eagle) and 'wald' (power); means eagle ruler.
Arnie began its life as an affectionate diminutive of Arnold, a name with deep Germanic roots combining *arn* (eagle) and *wald* (power or rule), yielding the vivid compound meaning "eagle-ruler" or "eagle power." The eagle, as a symbol of sovereignty and martial strength, made Arnold a prestige name among the Germanic tribes of early medieval Europe, and it traveled into England with the Normans after 1066, taking firm hold in the English onomastic tradition.
Throughout history, the full form Arnold has been borne by saints, military commanders, and scholars — most notably Arnold of Brescia, the 12th-century Italian reformer who challenged papal temporal power, and Benedict Arnold, whose name became synonymous with treachery in American revolutionary memory. But Arnie as a standalone name carries a warmer, more populist energy. Arnold Palmer, the beloved American golfer who dominated the sport in the 1960s and became one of its greatest ambassadors, was universally known as Arnie by his devoted fans — the so-called "Arnie's Army" — giving the name an indelible association with approachable greatness and sportsmanship.
Arnold Schwarzenegger brought the name into a very different register in the 1980s and 1990s, though he was rarely called Arnie. The diminutive form retains a friendly, unpretentious character — slightly retro, warmly nostalgic — that has made it appealing to parents seeking a name that feels both familiar and quietly distinctive in an age of maximalist naming trends.