Here’s a publicity photograph from the May 27 1930 edition of the Toronto Daily Star:
Unlike many of her family, Dolores Ethel Barrymore did not become an actor. The Barrymore family Wikipedia page indicates that she is still alive.
John Barrymore (1882-1942), nicknamed The Great Profile, was a second-generation member of the Barrymore family of actors (whose family name was originally Blythe).
Dolores Costello (1903-1979) was Barrymore’s third wife. She had an extensive career in silent film, first as a child actor from 1909 to 1915, and then from 1925 to 1931.
The couple’s other child, John Drew Barrymore Jr., was the father of actor Drew Barrymore.