born Issur Danielovitch December 9, 1916

Tough Guys 1986.

It is a fact of human nature that people want to fit into the social culture surrounding them. This is why Issur's parents changed THEIR name from Danielovitch to Demsky when they emmigrted to the USA. Apparently, Issur wanted to sound even more "American" when he joined the U.S. Navy.

Yes

well yes he has taken on two armys at once, he was sleepwalking at the time.

I don't know how he chose this name, but would you go to a movie starring Issur Danielovich Demsky?

Aaron Kirk Douglas's birth name is Aaron Kirk Buss.

I just checked Wikipedia on the internet and they don't seem to have ever been in a film together. Type in the name of a person and then the word Wikipedia and you'll get information on that person Wikipedia has nearly everyone in it.

This classic film was Paths of Glory (1957) starring Kirk Douglas and directed by Stanley Kubrick. The storyline involves French WWI soldiers who allegedly refuse to continue with an attack, and their superior officers decided to choose a handful of them for court martial (and eventual execution) for cowardice, as an example.

Yes -- in the lead role.

All four of Martin Sheen's (Ramon Antonio Gerardo Estevez') children are in show business: Emilio Estevez, Ramon Estevez (also billed sometimes as Ramon Sheen), Charlie Sheen (Carlos Estevez) and Renee Estevez.

Kirk had a severe stroke in 1996.

Despite his age (95 in 2011) and this condition, Douglas is still very much mentally alert.