Skitts - you probably haven't read the thread from "oddboddy", but for information, he is giving up setting quizzes after this one - simply because his quizzes (and many others) are constantly being ruined by people asking for answers on here and other sites. So congratulations.
These questions can be answered reasonably easily - after all, you have more than one way to tackle this - looking for the father, the mother and the children in separate searches and then finding the connection.
It is a charity quiz, so why is there a need to use other people's answers, apart from sheer laziness? Where is the satisfaction in using someone else's answer? If you can't find an answer, have a guess or leave a blank space (there's a novelty), but please, please don't spoil it for others and for the quizsetter. Why is there a need to feel you have to get all the answers by whatever means? Whatever happened to pride in doing something yourself?
This is an immensely satisfying quiz when you finish it - more so if you've done it yourself!