Duncan je lahko:
Ljudje Duncan (ime) Duncan (priimek)
Kraji Duncan, Alabama Duncan, Arizona Duncan, Arkansas Duncan, Britanska Kolumbija Duncan, Kolorado Duncan, Illinois Duncan, Indiana Duncan, Iowa Duncan, Mercer County, Kentucky Duncan, Mercer County, Kentucky Duncan, Mississippi Duncan, Webster County, Misuri Duncan, Wright County, Misuri Duncan, Nebraska Duncan, Severna Karolina Duncan, Oklahoma Duncan, Oregon Duncan, Pensilvanija Duncan, Južna Karolina Duncan, Tennessee Duncan, Virginija Duncan, Washington Duncan, Zahodna Virginija
Ladje HMS Duncan - plovilo/a Kraljeve vojne mornarice USS Duncan - plovilo/a Vojne mornarice ZDA
Izmišljeni svet Duncan Idaho Duncan Duncan Duncan MacLeod (Highlander: The Series)