Bu26 Fergus, 4th Earl of Buchan

Bu26 Fergus, 4th Earl of Buchan was the son of Roger, 3rd Earl of Buchan (Bu27).
Born: before 1170.
Married: .
Died before 1199.
 Child of Fergus, 4th Earl of Buchan:
(Bu25) Margaret, Countess of Buchan b c 1210 d betw 8 Apr 1242 - 1244
  Fergus, 4th Earl of Buchan succeeded to the title of 4th Earl of Buchan [S., c. 1115].
Source: http://www.thepeerage.com/p461.htm#i4601

[S6] G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume II, page 374. Hereinafter cited as The Complete Peerage.