Agnew Blacklock Blackstock Blackwood Blalock Brown Brownlee Cavan Cavers Dickey Douglas Douglass Drysdale Forest Forrest Forrester Foster Gilpatric Glen Glendinning Glenn Inglis Kilgore Kilpatrick Kirkland Kirkpatrick Lockerbie Lockerby Lockery MacGuffie MacGuffey MacGuffock McKittrick Morton Norton Sandilands Sandlin Soule Sterrett Symington Troup Young Brochure of the Clan Douglas Society of North America, Ltd. states the "various spellings of the above are recognized." "Other family names are added as Septs from time to time when persons present reasonable evidence to support an historic relationship to the Douglas family. These recognitions and relationships make no pretense to establish a line of peerage or confirm any genealogical relationship."