While i know my mothers side
http://www.rampantscotland.com/famous/blfamflora.htm
my grandfather born Late 1880's who nearlly went the 100 years
could recite the family tree by name and probably met a few of the older generations I guess.
My fathers
Layt .. cant really get any idea ,,the best I can do is that possibly this surname was abbreaviated (french maybe) after a sentance was served .. though I can"t find records I did get a phone call from a dediacted researcher once who mentioned this was fairly common in our early days in that if you did the time or were pardoned
a name change removed a little of the stigma of a convict past .