Do Millard Webb and Rob Reiner share the same nationality?
yes
Rob Reiner
Robert Reiner (born March 6, 1947) is an American actor, writer, director, producer, and activist.
 As an actor, Reiner first came to national prominence with the role of Michael Stivic on "All in the Family" (1971–79).
 That role earned him two Emmy Awards during the 1970s.
 As a director, Reiner was recognized by the Directors Guild of America (DGA) with nominations for the coming of age comedy-drama film "Stand by Me" (1986), the romantic comedy "When Harry Met Sally..." (1989), and the military courtroom drama "A Few Good Men" (1992).
 He also directed the psychological horror-thriller "Misery" (1990), the romantic comedy fantasy adventure "The Princess Bride" (1987) and the heavy metal mockumentary "This Is Spinal Tap" (1984).
Millard Webb
Millard Webb (6 December 1893 – 21 April 1935), was an American screenwriter and director.
 He directed 20 films between 1920 and 1933.
 His best-known film is the 1926 silent John Barrymore adventure "The Sea Beast" costarring Dolores Costello.
 Webb also directed the early sound Florenz Ziegfeld produced talkie "Glorifying the American Girl" released by Paramount in 1929.
 His active years were from 1916 to 1933.
Estelle Reiner
Estelle Reiner (June 5, 1914 – October 25, 2008), described by "The New York Times" as "matriarch of one of the leading families in American comedy", was an actress and singer.
 She was the wife of Carl Reiner and the mother of Rob Reiner. The Happy Ending (1931 film)
The Happy Ending is a 1931 British drama film directed by Millard Webb and starring George Barraud, Daphne Courtney and Alfred Drayton.
 Its plot concerns a father who deserted his family some years before returning home only to find his wife has told his children and neighbours that he died as a hero when he abandoned them.
 A silent version "The Happy Ending" had been made in 1925 based on the same play. Reaching for the Moon (1917 film)
Reaching for the Moon is a 1917 American silent adventure film directed by John Emerson and written by John Emerson, Joseph Henabery, and Anita Loos.
 The film stars Douglas Fairbanks, Eileen Percy, Richard Henry Cummings, Millard Webb, Eugene Ormonde, and Frank Campeau.
 The film was released on November 17, 1917, by Paramount Pictures.
 It has been released on DVD. Hearts of Youth
Hearts of Youth is a 1921 American silent film based on the novel "Ishmael" by E. D. E. N. Southworth.
 The film was directed by Tom Miranda and Millard Webb, with Webb writing the adaption for the screen.
 The movie stars Harold Goodwin, Colin Kenny, and Iris Ashton, and was released by the Fox Film Corporation Annie Reiner
Sylvia Anne "Annie" Reiner (born 1949) is an American author, playwright and poet.
 She is the daughter of American producer, writer and actor Carl Reiner, and actress Estelle Reiner.
 She is the sister of actor and director Rob Reiner. The Love Thrill
The Love Thrill is a lost 1927 silent film comedy directed by Millard Webb and starring Laura La Plante and Tom Moore.
 It was produced and distributed by Universal Pictures. The Sea Beast
The Sea Beast is a 1926 American silent drama film directed by Millard Webb, starring John Barrymore and Dolores Costello.
 The film was a major commercial success and one of the biggest pictures of 1926.
 "The Sea Beast" is an adaptation of the novel "Moby-Dick" by Herman Melville, a story about a monomaniacal hunt for a great white whale.
 However, the film alters the novel's plotline by establishing prequel and sequel elements that are not in the original story—such as the romancing of Esther and Ahab's safe return, respectively—and substitutes a happy ending for Melville's original tragic one.
 Some of the characters in the film do not appear in Melville's original novel. The Drop Kick
The Drop Kick (also known as "Glitter" in the UK) is a 1927 silent film directed by Millard Webb written by Katherine Brush about a college football player (Richard Barthelmess) who finds his reputation on the line when he pays an innocent visit to a woman whose husband kills himself.
 It was one of the early films of John Wayne who was only aged 20 in the film.
 He too played a college footballer.
 A mute silent print was transferred onto 16mm film by Associated Artists Productions in the 1950s and in 1960s by United Artists Television.
 Prints of the film are preserved at the Library of Congress and the Wisconsin Center for Film and Theater Research, Madison.