I have just found some information on a family of Adairs that landed in New York in the year 1775. Father: John Adair age 45, Mother: Janet McNillie age 43, Children: Janet age 17, Agnes, John age 6, and Alexander.This John age 6 fits the birth dates of your John Adair. Source: (code 1640.1) Dobson, David"Directory of Scotish Settlers in America 1625-1825" Baltimore Genealogical Publishing Co. Vo. 1. 1984 republished 1988 p. 2872nd Source (source code 9760) Whyte, Donald "A Dictionary of Scotish Emigrants to the USA" Vol 1Baltimore: Magna Carta Book Co, 1972 p. 504 Hope this helps.