Hallo Vaughan, and welcome to the board -
I am indeed still around. I wouldn't call myself the expert when it comes to CH Lightoller - I have done some work on him, but I'd say that Monika Simons and Pat Winship have greater expertise on this particular officer. If I can be of assistance I'd be happy to oblige - I do believe that Lightowler and some of the other variations all come from the same source, but how far back the connection goes I don't really know. Do you have Lancashire connections that you know of?
Cheers,
Inger