Clanmacgowin of Stranith was a Scoto-Irish clan recorded in the middle of the 14th century when Donald Edzear acquired the captainship from David II of Scotland. Galloway makes no solid distinction between the names McOwen, McEwen, McKeoune, McCowan, McGowan, etc., all of which can be easily conflated and confused when spoken, and the spellings of which were often not fixed until later in history. McCowan is an old family name from the Kirkconnel area where Robert the Bruce had a company of McCowans in the upper Nith district. The name here may indicate descent from Owen the Bald, king of the Strathclyde Britons, who was killed in 1018.
- Brown, James, "The History of Sanquhar, 1891", Chapter III.—Early History, p. 41. "One of Dovenald's sons was Edgar, who lived in the reigns of William the Lion and Alexander II. The children of this chief adopted the surname of Edgar for the family—one of the earliest recorded instances of the adoption of a surname in Nithsdale. One of his sons, Richard, owned the Castle and half of the barony of Sanquhar, together with the lands of Elioek, by charter from Robert Brus, the other half being owned by W'illiam de Crichton through marriage with Isobel, daughter of Robert de Ross (who was related to the Lord of the Isles) ; and, to his grandson Donald, David II., who began to reign on the death of his father Robert the Bruce in 1329, granted the captainship of the MacGowans, a numerous clan of the Scoto-Irish then located in the district."
- Patrick Dudgeon, "Macs in Galloway 1888" p. 23.[full citation needed]
- Hugh Lorimer, "A Corner of Old Strathclyde, Andrew Spence, 1952", p. 101.[full citation needed]
- George F. Black, "The Surnames of Scotland : Their Origin, Meaning and History, David II reigned Scotland from 1329 to 1371.", p. 505.[full citation needed]