Here's 4 more name i.d.'s that I recognized --
Carl Laemmle was a movie maker, then went into owning a chain of movie theatres in Los Angeles area. Still operates today as "art house" theatres. See laemmle.com for info.
Ronald Colman was an actor.
Ernst (not Ernest) Lubitsch was a famous film director.
Norman Chandler & Chandler family was owner of Los Angeles Times newspaper for many generations until selling about a decade ago.

For more info on any of these, their bio's are on Wikipedia.