Thanks Hibee. It is rather a long shot, though I am prepared for anything these days. Jean actually became Jane in England (I have found this to be the case in a number of families).
There is some confusion about the marriage date, 1723 or 1745, and the name, John Falconbridge is listed on the IGI but I am assured that this is a mistake and should be Samuel Falconbridge (which fits my theory).
I think I have an Alexander Boyd married to a Susannah but cannot connect Jean/Jane. Susannah fits as Samuel refers to his mother in law as Susannah in his will. No mention of wife so apparently she was dead. Son George is mentioned and a Samuel married Mary Smith in 1786 in Edinburgh, presumably a son, = if this is the right family).
Not sure where to go next. I have not come across Berd, or Bird to date.
Cheers, Valerie