I did know that one branch of Knowldens from the Deptford area of south London emigrated to Salt Lake, Utah and there are lots of them there, but I didn't know there were some in Pennsylvania.
I'm interested to know how much and what information you have about the Knowlden family. As I said in my previous notice, I still don't know when mine arrived in London and from where, and when the name changed. You might have some information that might shed some light on the whole business. If you would like to contact me direct, please do.