Another reference?
From the "History of the counties of Ayr & Wigton".
Sir George Campbell of Loudoun. He had a charter of the
Sheriffship of Ayr from James II., dated 16th May, 1450.
It is supposed the Campbells of Stevenston-Campbell, or
Ducathall, were derived from Hew, a younger son of this Sir
* Robertson. The Campbells of Loudoun Hill were probably an
older branch.
Means nothing to me, but does it mean anything to you?