In Scotland the name is considered of dual origin, the first coming from Alwyn, a name favoured by the ancient Earls of Lennox and secondly, from the popularity of the name among the Bretons who accompanied William the Conqueror in his invasion of England in 1066. In the ensuing years many of these nobles migrated North to found great Scottish families, among whom were the Royal House of Stewart. A `symbolic' origin, as in `Aluin'(sparkling), has also been suggested, but such would be more appropriate to the various streams and rivers which bear that name - some may have derived their name from residing near such a feature. As the name became popular in two distinct cultures it strengthens the case for dual origin and places the onus on the individual to establish ancestral links before clan association is claimed. In such context the name has traditionally been linked to the Macfarlanes and Macdonalds of Clanranald - the former through their early association with Earldom of Lennox, the latter from the fact that `MacAllan'(sic) is the Gaelic title borne by their chiefs. Many of the MacAllans, Allansons and Allans who settled in Aberdeenshire were descended from the son of a Macfarlane chief who had migrated there when his clan was proscribed in the 16th century. Many of similar names who settled in the Lowlands are descended from Clanranald Macdonalds. As with many surnames derived from a `patronymic' tradition, quite distinct lineages have evolved throughout the country and the possibility of ascertaining their individual origins are masked by time. The name has also been linked with the Mackays of the far North, and some have association with the island of Bute in the Clyde estuary where, through contraction, it is derived from MacAllan, and frequently takes the form 'Callan' . The name became popular in Scotland by its frequent use in the family of the Stewards (later Stewarts), Alan, son of Waldeve witnessed charters by ing David I in 1139. Subsequently it appears regularly in old Scottish records; Alanus, brother of Galfridus Redberd, witnessed the sale of a tenement in Perth in 1219. TARTAN: There is no Allan tartan as such but bearers of the name Allan may wear the tartans of Clan MacFarlane or, alternatively, MacDonald of Clanranald. No CHIEF has been established for the name so clan allegiance would be decided by evidence of descent from ancestors who had clan associations.