Not the daughter of Robert "Riach" de Atholia

Margaret Stirling is the daughter of Lucas Stirling.1 She married Sir Colin Campbell, 1st of Glenorchy, son of Sir Duncan Campbell, 1st Lord Campbell and Margaret Stewart, before 27 October 1467.1

Children of Margaret Stirling and Sir Colin Campbell, 1st of Glenorchy

1. Marion Campbell+2 d. bt 28 Apr 1530 - 23 Aug 1530
2. George Campbell1
3. Mariot Campbell1
4. Helen Campbell+1
5. John Campbell, 1st of Lawers+1 d. 9 Sep 1513

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References

1. https://www.thepeerage.com/p15050.htm#i150500 cites
   1. [S37] BP2003 volume 1, page 493. See link for full details for this source. Hereinafter cited as. [S37]
   2. [S6286] Clan MacFarlane and associated clans genealogy, online http://www.clanmacfarlanegenealogy.info. Hereinafter cited as Clan MacFarlane.