Hi.
Came across this thread through a Google search as I volunteered to help a colleague trace her mothers middle name of Sydserff.
So far, though LDS and Scotlands People, I have traced her mothers side to an Alexander Sydserff born 1787 (son of Alexander Sydserff and Margaret Dickson) in Whittinghame, East Lothian.
If anyone has any information to help me take the research further I would be most grateful :-)