Murdoch Lennox of Duntreath

The peerage of Scotland: containing an historical and genealogical account of the nobility of that kingdom, ... collected from the public records, and ancient chartularies of this nation, ... Illustrated with copper-plates. By Robert Douglas, Esq;. Douglas, Robert, Sir, 1694-1770. Page 401-402 <link >

“Into what family this heroic earl marri∣ed, we cannot, with any degree of certainty, affirm; but, if tradition can be credited, it was to a sister or daughter of Donald earl of Marr, and certain it is he had issue two sons, who survived him.

1. Donald, his heir.

2. Murdoch, who obtained in patrimony, from his brother, the lands of Duntreath, &c. in the parish of Strathblane, in the earl∣dom of Lennox, which, upon his death with∣out succession, returned again to the family.”

http://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY%20LATER.htm#_To...

Earl Malcolm & his wife had children:

2. MURDOCH . "Waltero de Fosselane, Willielmo de Galbraith, Murdaco fratre comitis de Levenax, Yvaro Campbell, Malcolmo filio Duncano" witnessed the undated charter under which "Donaldus comes de Levenax" granted land "de Eschend" to "Andree de Cunninghame"[302].