Chief: Alexander Gilbert Haldane Robertson of Struan

Clan Donnachaidh, which means the children of Duncan, emerged from the union of the Scottish and Pictish kingdoms and counts amongst its forebears the Kindred of Saint Columba.

The main clan name and that of the chiefs is Robertson, but many other names taken by those descending from the chiefs or belonging to families who lived on clan estates and sought the chief's protection can be considered septs of the clan.

The most prominent are Duncan and Reed but others that may be septs include:

Collier Colyear Connachie Donachie Donnachie Duncanson Dunnachie Inches MacConachie MacConnichie MacDonachie MacInroy MacIver MacIvor MacLagan MacLaggan MacRob MacRobb MacRobbie MacRobert MacRobie MacWilliam Reed Robb Roberts Robson Roy Stark Tonnoch Tonnochy