I've got back to one of my 16 x g.grandfathers born 1360, but that is only because the family way back was very wealthy so there are records available in National Archives, Burkes Peerage, Chancery Court proceedings etc. and, of course parish records. I also have lots of wills, one or two of which I can barely read but I can make out the names of the children. Of course, once my ancestors stopped being the 1st son of the 1st son their wealth dropped off and although most of them had a good trade my 3 x g.grandfather was only a labourer and died in the workhouse.
Following other lines that married into the one above I've got back even further as many of the men were Knights and Lords so there's lots of info about them in Oxford Dictionary of National Biography and other sites but although the info is in print, I've not verified it personally and I'm not sure how I could do that. From various pieces of literature I believe that my 22nd x g.grandfather accompanied King John to Runnymede where he was one of the 25 witnesses to the signing of the Magna Carta.
Ironically I can't trace my one of my g.grandfather's origins and he was only born about 1858
