From Old English elements meaning 'old' and 'powerful ruler,' or a variant of Aldrich meaning noble ruler.
Eldridge carries its English landscape inside it. The name derives from the Old English Ælfric or Aldric, a fusion of ald ("old," sometimes interpreted as "noble") and ric ("ruler," "power"), producing an approximate meaning of "noble ruler" or "old power" — the kind of gravity-laden compound that Anglo-Saxon aristocrats favored for sons they hoped would lead. The surname form Eldridge developed as the name passed through Norman French and Middle English, absorbing the softened consonants of centuries of spoken use before reasserting itself as a given name in nineteenth-century America.
The name's most historically significant modern bearer is Eldridge Cleaver (1935–1998), the Black Panther Party leader and author of Soul on Ice (1968), a memoir written in prison that became one of the defining documents of the civil rights and Black Power movements. His fierce, tortured, finally ambivalent radicalism gave the name a charged political resonance that it has carried ever since. Earlier, the abolitionist and politician Eldridge Gerry (1744–1814) — Vice President under Madison, and the unwilling eponym of "gerrymandering" — had already planted the name at the intersection of American democracy and controversy.
As a given name Eldridge was most common in the American South during the post-Civil War decades, often bestowed with the weight of aspiration — "old power" reinterpreted as future authority. Today it reads as a strong, unhurried, deeply American name: too substantial to be fashionable, too historically grounded to be forgotten, and rich enough in narrative that whoever bears it always has something interesting to say about their name.