The first name Adair is of Celtic, Gaelic, Scottish, English origin. It is often a boy or girl name. It has the following meaning(s):
Celtic: From the Ford by the Oak Trees
Gaelic: From the Oak Tree Ford
Scottish: From the Oak Tree Ford. Uncertain Origin. May Be a Variant of Edgar, or from the Gaelic for 'Oak Tree Ford'. Used for Many Hundreds of Years As Both Surname and First Name
English: Variant of Edgar: Fortunate and Powerful. from the Old English Name Eadgar, a Compound of 'Ead' Meaning Rich or Happy, and 'Gar' Meaning Spear. Famous Bearer: King Edgar of England; American Author Ed
Celtic: From the Ford by the Oak Trees
Celtic: By the Oak Trees
English: Noble, Exalted