He had four children, two boys, two girls. I know that Roy Patrick Disney works in the film industry, but, don't know exactly how, Tim Disney is a filmmaker and did " A Question of Faith" in 2001, Abigail Disney is the Founder of the Daphne Foundation, (set up to give grants to soicial groups in need). I can't find any direct information on his other daughter, Susan, except that she married at some point and is Susan Disney Lord.
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I just found out he died today :(
My sympathies to them.