Meaning of -AIRE in English
a suffix that forms nouns denoting a person characterized by or occupied with that named by the stem, occurring in loanwords from French: concessionaire; doctrinaire; legionnaire; millionaire.
[ -arius -ARY, a learned doublet of the F suffix -ier -EER, -IER 2 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012