 1957 is during the 200-year dormancy of the Chiefship of Clan MacTavish, and a full 40 years (1997) before Edward Stewart Dugald MacTavish was recognized by Lord Lyon, Sir Malcolm Innes of Edingigh, as the Chief of Clan MacTavish.A clan is NOT a sept of another Clan.Clan MacTavish is distinct from Clan Campbell.