Bob Irwin
Robert Irwin (born 8 June 1939) is an Australian naturalist, animal conservationist, former zookeeper, and a pioneering herpetologist who is also famous for his conservation and husbandry work with apex predators and reptiles.
He is the founder of the Queensland Reptile and Fauna Park (now known as Australia Zoo).
He is the father of the late conservationist and television personality Steve Irwin.
He continues to campaign for wildlife and its environment through his foundation, Bob Irwin Wildlife and Conservation Foundation Inc.
Steve Irwin
Stephen Robert Irwin (22 February 1962 – 4 September 2006), nicknamed "The Crocodile Hunter", was an Australian zookeeper, television personality, wildlife expert, environmentalist and conservationist.
Irwin achieved worldwide fame from the television series "The Crocodile Hunter" (1996–2007), an internationally broadcast wildlife documentary series which he co-hosted with his wife Terri.
Together, the couple also hosted the series "Croc Files" (1999–2001), "The Crocodile Hunter Diaries" (2002–2006), and "New Breed Vets" (2005).
They also co-owned and operated Australia Zoo, founded by Irwin's parents in Beerwah, about north of the Queensland state capital city of Brisbane.
Terri Irwin continues to operate Australia Zoo and raise their two children.
The Sea Shepherd Conservation Society ship
MY "Steve Irwin" was named in his honour.
Robert W. Levering
Robert Woodrow Levering( October 3, 1914 – August 11, 1989) was a U.S. Representative from Ohio, son-in- law of Usher L. Burdick and brother- in- law of Quentin N. Burdick.
Robert Vadra
Robert Vadra is an Indian businessman, entrepreneur and the husband of Priyanka Gandhi.
He is the son -in- law of Sonia Gandhi and Rajiv Gandhi, and the brother- in- law of Rahul Gandhi.
Nick Sidi
Nick Sidi( born 22 February 1966 in Manchester, England) is an English actor.
He is the son -in- law of actress Rosalind Knight and brother- in- law of actress Susannah Elliott- Knight.
He often plays drama or comedy roles on television and frequently appears in BBC dramas.
Greg Penner
Gregory B. Penner( born December 18, 1969) is an American businessman and venture capitalist.
Penner was named the chairman of Walmart on June 5, 2015.
He is the son-in- law of S. Robson Walton and the grandson- in- law of Sam Walton, the founder of Walmart.
R. K. Johnson
Robert Kirthwood" Lefty" Johnson( August 28, 1910- November 4, 1971) was the pioneer financial officer of Bob Jones University and the first biographer of Bob Jones, Sr..
Bob Jones III
Robert Reynolds Jones III( born August 8, 1939) was the third president of Bob Jones University.
The son of Bob Jones Jr., and the grandson of Bob Jones Sr., the university's founder, Jones served as president of BJU from 1971 to 2005.
Charles Francis Norton
Charles Francis Norton( 1807 – 1835) was a 19th- century Member of Parliament for Guildford.
Norton was also a Captain of 52nd Light Infantry; son-in- law of Sir Colin Campbell; brother- in- law of writer Caroline Norton
Malcolm Robert Irwin
Malcolm Robert" Bob" Irwin( 2 March 1897, Artesian, South Dakota – 12 October 1987, Madison, Wisconsin) was an American agronomist and pioneering immunogeneticist.

Question: Who is Bob Irwin's child-in-law?
Answer: Terri Irwin