Variant of Roscoe, from Old Norse elements meaning deer wood or deer forest.
Rosco is a streamlined American spelling of Roscoe, which derives from the Old Norse place name Rá-skógr, a compound of rá (roe deer) and skógr (wood or forest), meaning roughly deer forest or roebuck's wood. It came to England with Scandinavian settlers and attached itself to a Lancashire hamlet, from which it passed into a family surname, then across the Atlantic to become a given name popular in the American Midwest and South during the nineteenth and early twentieth centuries. The name carries a distinctly American flavor.
Roscoe Conkling, the imperious New York senator and political boss of the Gilded Age, wore the name with combative grandeur. In a lighter register, Roscoe Arbuckle — the silent-film comedian known as Fatty — made the name synonymous with broad physical comedy and early Hollywood, before a tragic scandal clouded his legacy. On television, Rosco P.
Coltrane, the bumbling sheriff of The Dukes of Hazzard, gave the name a comedic rural twang that influenced its perception for a generation. Stripped of those specific pop-culture associations, Rosco has an appealing earthiness — it feels like boot leather and open country, a name that doesn't try too hard. The shorter spelling softens it slightly, giving it a nickname-like ease. It belongs to a growing family of vintage occupational-and-place surnames — Arlo, Milo, Otto — that have found new appreciation among parents looking for names with genuine historical texture and a hint of frontier American character.