Yes, this is definitely the same family. My records were given to me and I have yet to verify all this information, but I show the following:
Roger Cullen (spelled Rodger in my records) born abt 1799 married Catherine Clark born abt 1799. I'm also showing the same 5 children, all born in Armagh, but Armagh is not always listed exactly the same.
Margaret B 1819
James B 1822
Eugene Owen B May 29, 1825 D Nov 27, 1905
Denis B 1828
Jane B 1832
Eugene Owen (if I have the name correct) was my great grandfather.
My records are very sketchy, as the person who did all the research is my aunt on my mother's side. The Cullens were on my father's side, so there isn't as much information. In addition, my aunt is now 98, so all of her work was done by visiting libraries, cemeteries, churches, court houses, etc, either in the US or Ireland. Some of the records are still in hardcopy and in need of review. I'm hoping to get through it a little bit at a time. Let me know if there is anything I can provide. Thank you for the post!