Well, there's a strong possibility that we are related! Do you know much of your Irish ancestry? We are stuck at the marriage certificate between James Mulvaney and Bridget Rothwell Mulvaney. We know that James had a brother (or Mulvaney relative), Thomas,(16) who came to the US with them in 1850 on the John Hancock. I'd love to hear what you might know about your Mulvaneys.
Where in the UK do you live? I lived in Bath for 6 months in college.