AFAIK we only have the DNA of one of his doubles. Otherwise one would have to get it from his grand/great-grand kids most of which are in the USA and have chan

AFAIK we only have the DNA of one of his doubles. Otherwise one would have to get it from his grand/great-grand kids most of which are in the USA and have changed their last name. There were interviews with some of his grand kids but I don't know if it's on the internet. This was in the 90's.