From Old English 'Eoforwine' meaning 'boar friend,' or Germanic 'Erwin' meaning 'army friend.'
Irwin carries two distinct linguistic genealogies that converged in English usage. The first traces to the Old English name Eoforwine, a compound of "eofor" (boar) and "wine" (friend) — giving it the vivid, totemic meaning of "friend of the boar," a creature associated in early Germanic culture with courage and ferocity. The second origin draws from the Scottish and Irish surname tradition, where Irwin derives from the Gaelic "Irbhinn" or from place names in Ayrshire.
Both streams fed a name that was common in the British Isles through the medieval period before declining and then reviving as a given name in nineteenth-century America. The name's most famous modern bearer was Steve Irwin, the Australian "Crocodile Hunter," whose exuberant wildlife television programs made him a global icon in the 1990s and early 2000s. His enthusiasm and fearlessness — qualities that would have pleased any ancient bearer named for the courageous boar — gave the name a fresh, outdoorsy energy.
Literary bearers include the American comic novelist Irving — a close cognate — and Washington Irving, who gave the name a distinguished literary heritage in the young American republic. Irwin peaked in American usage in the early twentieth century, sitting comfortably in the midrange of popular names before declining from the 1960s onward. Today it feels genuinely vintage, part of a cohort including Irv, Erwin, and Irving that evokes a particular era of American Jewish and working-class naming culture. Its rarity in current use means a child named Irwin today will almost certainly be the only one in the room.