Andrew Aitchison here from New Zealand. is the spelling of the family you tracing aitchison or aitcheson , you have spelt it both ways . Besides that my family were from Paisly Scotland, Dad Was James Paton Aitchison , He was born about 1939 or there abouts , His dad was a James Aitchison . Not sure of birth date or his relatives. Dad is dead now but I will ask mum who she can remember on dads side of family. My dad has a brother Andrew that lives in Australia . I might get info from him . I will do what i can to see if it our family line or not. There are also some Aitchisons not far south of here that have been out in NZ a couple more Generations .