Cadets
In history and heraldry, a clan cadet branch consisted of the male-line descendants of a clan chief’s younger sons (cadets). Such off-spring were not expected (required?) to produce any offspring – though of course may have done so. In some cases, the cadet branch would become successful and perhaps own land and be awarded titles – laird or a knighthood or even higher rank. Such significant branches often became associated with a particular geographic location and became acknowledged as (Surname) of “X”. There are many younger sons in the Buchanan line who achieved such acknowledgement of their success.
Septs / Affiliated Families
In Scottish clans, septs are families that followed another family’s chief. These smaller septs would then comprise, and be part of, the chief’s larger clan. A sept might follow another chief if two families were linked through marriage; or, if a family lived on the land of a powerful laird, they would follow him whether they were related or not.
Today, sept lists are used by clan societies to recruit new members. Such lists date back to the 19th century, when clan societies and tartan manufacturers attempted to capitalise on the enthusiasm and interest for all things Scottish. Lists were drawn up that linked as many surnames as possible to a particular clan. In this way, individuals without a “clan name” could connect to a Scottish clan and thus feel “entitled” to use its tartan. Of course, in some cases, tartans have been created sometimes in more recent years, by members of some Septs.
Source: http://www.clanscottscotland.com/septs-cadets/4592225028
Clan Buchanan Cadets and Septs/Affiliated Families
LENY and Cadets
Auchinden, Mochastel, Arnprior, Auchlessie, Glenny, Gartocharne, Auchentorlie, Craigend, Hillington, Baldernock, Campsie.
DRUMMAKILL and Cadets
Ross, Drummakill, Cameron, Ibert, Ballochruin, Drumhead, Middle Tulliechwan, Hiltoun, Auchentorlie, Moss, Auchintoshan, Carstoun, Middle Balfunnyng, Croy Cunninghame, Little Croy, Finnick-Drummond, Ballachdachie, Easter Ballat, Temple Ballat, Dowenhill.
CARBETH and Cadets
Ardoch, Boquhan or Meikle Boquhan
ARNPRIOR – SPITTAL – AUCHMAR
Septs / Affiliated Families
Colman, Donleavy, Dove, Dow, Gibb, Harper, Lennie, MasAslan, MacColman, MacCormick, MacGibbon, MacGilbert, MacKinlay, McMaster, MacMurrie, MacMurchy, MacWattie, Masterton, Risk, Ruskin, Spittal, Watson, Watt, Yule.
Various spellings of these names can be found.
In times of trouble, the clan would meet on the shores of Loch Lomond opposite the Island of Clairinch. The rallying cry of the Clan Buchanan is Clairinch.
When the estates of Buchanan were lost they were purchased by the Graham Family ( Duke of Montrose ).
In the 1930s a wealthy Clansman William George Buchanan of the family of Drummakill purchased Clairinch from the Montrose estate and, on his death in 1939, gifted the island to The Buchanan Society of Glasgow where it remains to this day.
More information about cadet branches: https://en.wikipedia.org/wiki/Cadet_branch