6th of Glenbuckie
According to Stewarts of the South John was called "Iain Dubh Mor" ("Big Black John") to differentiate him from his younger half-brother, Iain Dubh Beg ("Little Black John"). A bond in 1622 which names the heads of most of the Balquhidder Stewarts includes: "John Dow (Mor) Stewart in Glenfinglas and his brother-german, Walter". Dow is an Anglicization of Dubh which means "black". Gordon MacGregor suggests, and we concur, that these two brothers were sons of Duncan Stewart, 5th of Glenbuckie. John signed the 1654 Bond of Keltney Burn along with the heads of all the other Stewart houses in Balquhidder, Athol, and Appin swearing tacit allegiance to King Charles II. The following family is found in miscellaneous notes in the John MacGregor Collection (1905) and refers to this family: "John Dow Stewart in Glenfinglas had two sons,- James and Alexander. James 1673 had a son named Alexander 1703 who married Mary Stewart and they had three sons - Robert Duncan and James. Alexander who was father to Duncan Stewart in Lack 1676 and grandfather to John Stewart in Glenbuckie." The 1622 bond doesn't specify which of the two John Dubh Stewarts, Mor or Beag, was residing in Glen Finglas, however the latter reference from the John MacGregor Collection indicates that it was John Dubh Mor Stewart who resided in Glen Finglas, while John Dubh Beag resided in Muirlaggan and Lecreich.