And Herbert was 14 years older ...

 Herbert Marshall was born May 23, 1890, in London, England.  After early training as an accountant, Mr. Marshall chose to become an actor, gaining 20 years of experience on the stage before making his first movie.  He was a very private and reserved gentleman, traits carried over into his acting style.  The five-time married actor was the father of two girls.

Herbert has the almost unique distinction as having been in a movie with both Robert (Riptide, 1934) and Robert Jr. (College Confidential, 1960).  He shares that distinction with Jayne Meadows who was in The Lady in the Lake (1946) with Robert and in College Confidential with Skip.