MacClellan is a variant of the surname McClelland, which, like many Scottish and Irish surnames, originates from the Gaelic Mac Giolla Fhaoláin, meaning "son of the servant of Faolán." Faolán is an Irish name meaning "little wolf," derived from Old Irish fáel ("wolf") plus a diminutive suffix. This name was borne by an Irish saint who undertook missionary work in Scotland. Geographic Distribution According to Forebears, the surname MacClellan is most prevalent in the United States, followed by Canada and Scotland. Its highest density is found in Scotland, particularly in the Scottish Highlands and islands where Gaelic naming traditions were strongest. Within Ireland, the name is more common in Northern Ireland due to historical Scottish settlement, especially in the province of Ulster. Variants and Adaptations Variants of the name include MacClelland, McClellan, and the original Gaelic form Mac Giolla Fhaoláin. The Scottish Gaelic form is MacGilleFhaolain. The anglicization of the name over centuries has led to multiple spelling variations, reflecting regional differences and phonetic spelling practices. While MacClellan typically omits the final 'd' of McClelland, both forms trace back to the same original clan name. Cultural Significance The root Faolán connects the surname to a wolf totem, likely associated with strength and ferocity in early Irish culture. Saint Faolán, also known as Fillan or Fáelán, a 7th-century Irish monk who established a monastery in Lochalsh, Scotland, gives the name added religious honor. The tradition of using Mac Giolla Fhaoláin ("son of the servant of Faolán") underscores how surnames often evolved as patronymics or descriptors of family allegiance to a saint or patriarch. Meaning: Variant of McClelland ("son of the servant of Faolán") Origin: Scottish and Irish Type: Surname Root: Faolán ("little wolf") Usage regions: Scotland, Northern Ireland, United States, Canada