My nans real father, who died when she was a baby, was called Thomas Smith - we do not have his wedding certificate and we know nothing about him. Trying to search for a death of Thomas Smith between 1917-1920 in the West Midlands is crazy - we don't know if he died because of the war, because of that flu thing after the war, due to natural causes, nothing, but it's not going to be easy until we get the wedding certificate I guess! I dread tracing his family!
There is also Smith on my fathers side aswell.
My surname is O'Driscoll, my Irish ancestors come from Dublin, Swords and Cork - I'm not sure how hard that is going to be to trace yet...
The furthest ancestors I have are Adams and Burton (I love that combination

) and the Scott family from Sutton In Ashfield, apparently there were many Scotts there!