re: "vide Playfair's British Family Antiquity vol ix". WHITE KNIGHT who was the 2nd son of Gerald, Earl of Desmond, at a place called The Ford of ATH-DARE, in the County of Limerick, in the Reign of Robert Bruce (1306-1329), and with his brother William, made his escape to Scotland where he assumed the name of that Ford called ATH-DARE (Irish aboriginal word for ADAIR).
This Robert, (first of his family who took the name of ADAIR) soon after he went to Scotland married ARABELLA CAMPBELL, eldest dau. of the Rt.Hon. John Campbell, Lord of Argyle, and Viscount of Lorne. This probably could be checked from LORD ARGYLE c.1300.
The next bit was not in "Burke 1852" and by her he had issue, SIR WILLIAM ADAIR, his eldest son, who married PHILADELPHIA CUNNINGHAM, dau. and co-heiress of Sir Albert Cunningham of AYR and his wife Mariana Cunningham (nee Graham) who was dau. of Sir Marmaduke Graham of Aberdeen.
Sir William & Philadelphia ADAIR (nee CUNNINGHAM ) (c.1350 ?) had issue -
Sir NINIAN ADAIR who first assumed the title of LAIRD of KINHILT in Galway in the Kingdom of Scotland. He married ARABELLA ECHLIN, dau and co-heiress of Sir John ECHLIN of Piladra in the Shire of Fife, Scotland. ............................. see "Memoirs of the Ancient Familie of the Echlins of Pittadro in the County of Fyfe, Scotland, now transplanted to Ireland" by Geo. Crawford. 18 Aug 1747. Includes "Lineage of the Echlin Family" and makes reference to the Adair entry in Playfairs "British Family Antiquity" Vol. ix.