I've only just realised that replies may appear within the discussion thread, in addition to email replies, hence the delay in my reply to you, many apologies!!
Very many thanks for that, I will search for those films, I don't mind slogs at all if they reveal results! The main difficulty with Weisz/Vaisz I think is that it is a pretty common name, and not all branches seem to be interrelated, but matching up with other Weisz families from Balassa I think will also help, where this forum is also invaluable I think.
Thank you so much again for your help and interest