Yes, Robert Lincoln married Mary Harlan in 1868. They had 3 children: Mary "Mamie" Lincoln, Abraham "Jack" Lincoln, and Jessie Lincoln, but Jack died at the age of 16.
no
Robert mitchum had 2 sons James and christopher mitchum. Both actors and writers. Mr. Mitchum has a daughter petrina. Hi wife was Dorothy .
Robert Blake has one son-Noah Blake who was born on February 1, 1965. Noah is an actor.