Thanks for the help guys, I'll check the links out.
The story I know is a bit vague but other members of the family probably know more details as I've got a fairly long lived family. Apparently my great great grandfather was born an appropriate amount of time after his mother had been working at some castle or other (I think my grandmother might even know which castle) at which a royal party had been staying. I believe that I can at least get probable (if not actual) dates, as we might even know her name. It was indicated to me that one of the Princes at the time (who had a reputation) passed through. Although it may not have been a royal, it must have been someone of fairly high ranking because the mother was looked after money wise and the child had his schooling and apprenticeship paid for, allowing him to climb the social ladder from pauper to master.
Grast