A Sister Of John Barclay

From Prominent Families of New York....:

Colonel David Barclay, of Ury, born in 1610, was a son of David Barclay, laird of Mathers.
His wife was Catharine Gordon, daughter of Sir Robert Gordon, 1580- 1656, of Gordonstown, the second son of the titular Earl of Sutherland, Alexander Gordon.  The eldest son of this union was Robert Barclay... . His brother John, who removed to America, married Cornelia Van Schaick and became the ancestor of the New York Barclays.

A sister of John Barclay married the son of Sir Evan Dhu Cameron, of Lochiel, and her daughters married the chiefs of such Scotch houses as Cameron of Dungallen, Campbell of Auchlyne, Macgregor of Bohawslie, Grant of Glenmoriston, McPherson of Cluny, and Cameron of Glendinning.

This one?

Married To One Of The Twelve Daughters

The Celtic magazine, Volume 6:

Sir Alexander MacDonald, Fourteenth Baron and Seventh Baronet of Sleat....

Being married to one of the twelve daughters of Sir Ewen Cameron of Lochiel, he would be in a position to secure great influence in his own favour and that of the family for the other eleven were married respectively to Alexander Drummond, of Bathaldies; Allan Maclean, of Ardgour; Grant of Glenmoriston; Allan Cameron of Glendessary; Macpherson of Cluny; Archibald Cameron of Dungallan; Peter Campbell of Barcaldine; John Campbell of Achallader; Robert Barclay of Urie; Macgregor of Bochady; and Macdonald of Morar, while her eldest brother, Sir John Cameron, was married to a daughter of Sir Duncan Campbell of Lochnell.