I am also working on my husband's line, Bair. John Bair married a Lydia Register in 1829, I don't have anything else on Lydia. John was also married to Jerusha Ann Richardson.
John's father was Adam Bair, married to Catherine Bowermaster. Adam's father is Henry Bair, his father Rudolph Bair (Bar), married to Catherine Wingert.
Hope that helps.