I too am researching this family. I am a descendant of Bridget Kenna and John Harding. I would be very happy to exchange info on this family.
John Harding's parents died of cholera on the way from Newfoundland. They were close friends of the Kennas. I think that possibly Patrick and Elizabeth Kenna died too on the boat or soon after coming to Port Washington. That is why Nicholas Kenna raised his nieces. I have more info on this family and will gladly share.
Vicki Reynolds Mazur
iampilot@sbcglobal.net