Manus is the Irish form of Magnus, a Latin name meaning "great". In Ireland, Manus (also spelled Mághnus) has been used as a Gaelic adaptation, with historical roots among medieval Irish nobility linked to Norse–Gaelic interactions on the western coasts.The etymology traces back to the Late Latin magnus ("great"), adopted as a given name after the 7th-century Saint Magnus, a missionary in Germany. A key influence was Magnus I of Norway, who reigned from 1035 to 1047. According to some sources, he was named after Charlemagne (Latin: Carolus Magnus), but a Norse name Magni also existed. The name gained popularity across Scandinavia following King Magnus I, with six subsequent Norwegian kings and three Swedish kings bearing the name.Notable bearers in Irish history remain limited, partly due to the absence of a dedicated Wikipedia extract for the personal name Manus. However, the related surname MacManus (possibly shorted to Manus) is common in Ireland; the 2010 US Census records Manus as a surname ranked 11,882nd, predominantly among White (80.87%) individuals.Cultural VariantsAcross Europe, the name appears in various forms: in Scandinavia as Magnus (Swedish), Mogens (Danish), Magnús (Icelandic); in Finland as Mauno, Manu 3, or Maunu. These reflect regional adaptations while retaining the core element of "greatness". In Irish, the influence occurred during the medieval period when Norse settlers and Gaelic overlords intermarried, leading to adoption of Scandinavian names in Gaelicized forms like Manus.Any PersonBeyond its use as an Irish first name, Manus is known as a subgroup of islands in Papua New Guinea, deriving from Polynesian languages – unrelated to the Irish name.Original language: IrishMeaning: "great" (via Magnus)Type: First name (also surname)Usage: Ireland; historically also in Scotland