<<snipped>> confirmed information, other than his name, is unknown to me <<snipped>> Some things that might help - - you could have one individual in your GEDCOM to represent your GF and enter the certain data in the usual fashion. Then, the speculation could be entered as a note in [[ ]] - see "Private Notes" in the help file - against that person. You just have to remember when you print a report off, to suppress Private Notes. - you could have one individual in your GEDCOM to represent your GF and enter a second individual to contain the details of the speculated person. You then link the 2 guys with an association - go to the All tab for the individual, right click their name and choose Add Miscellaneous / Add Associated Person / Add Link to Existing Individual. You need to do this for BOTH guys but you can add a text to the Association saying "Possibly Same Person". I've not quite figured how to make that appear on diagrams though. You may also choose to make this guy Private. The second method is especially useful if you know genuine details about him but aren't sure if he is your relative, i.e. that John Doe may be my grandfather but whether he is or he isn't, he definitely died on DD MM YYYY. At the end, though, don't be afraid of putting speculation into your file PROVIDED it's clearly labelled as such. The brutal truth is that even if we are 95% sure of each individual on a generation, the odds of ALL that generation being correct are less than 95% - and a lot less, the further you go back and the more people you have. So if anyone gets sniffy about it, well, it gets more and more certain we've all gone wrong somewhere. Just console yourself that you recognise your problems and the sniffy ones don't! Adrian B