From the study of my own Disney family tree for over 40 years I have registered a One Name Study with GOONS in the UK and have over 15 distinct as yet unconnected Disney family groups in the UK. The availability of yDNA tests should help to find out if the family groups are linked or not. The project is open to anyone, worldwide to join. yDNA tests can help with family history research in many ways. Find who you are related to. If you can't find a document to prove a common ancestor a yDNA test could provide evidence.