:My Castle Dawson (ok, Castledawson) Hillmans appear to have left for New York around 1824 but (1) I know already of a Margaret Hillman from an earlier generation who married a McCrory (family subsequently became Macrory) whose descendants were mostly in Ireland through the nineteenth century and (2) it seems likely that there were other kinsfolk who resisted the blandishments of upstate New York. From the side of my information, much of what I (think I) know is summarized at http://www.hillmanc.fsnet.co.uk/hillman.htm
:From the side of your information, I'd welcome more information, especially regarding your earliest known / recorded Hillman ancestor(s) (names, dates of birth/married death, spouse(s). It would be good to see if between us we can find a link.
:Either way, success with your researches. Regards Charles Hillman