Are you a descendant of any of the people, I have listed. My Lappans settled in Lansdowne, and I believe that most of the Lappans in the Leeds area descend from the original Pioneers, James Lappan & Nancy Thompson.
There was a Lappan family, who settled in Westport, but they moved on, and I haven't been able to connect them to my family, even though they came from Armagh too.
There were alot of Lappans in County Essex as well, who were French.
Let me know, where you fit in. I have alot of info.