Eleonor Simmons
Mark Harmon never was an Olympic gold medalist. You may be confusing him with Mark Spitz who WAS an Olympic gold medalist swimmer in the 1972 Olympics.
Leisel Jones is an Olympic gold medalist swimmer from Australia.
Murray Rose
an olympic swimmer and gold medalist
Amanda Beard was a well known American swimmer, many times Olympic gold medalist.
Paralympic swimmer Liz Johnson of Great Britain won 1 medal, a gold in women's 100 meter breaststroke at the 2008 Paralympic Games in Beijing.
The best Paralympic swimmer from Great Britain is often considered to be Ellie Simmonds. She has won multiple gold medals across various Paralympic Games and has set numerous world records in her events. Simmonds is known not only for her exceptional talent in the pool but also for her inspiring advocacy for disability rights and sports. Her achievements have made her a prominent figure in both Paralympic swimming and British sports.
Leisel Jones does not have any siblings. Leisel Jones is a former Olympic gold medalist swimmer and she is from Australia.
Sharron Davies is a Gold Medalist but is also a Silver Medalist!
Jessica Long, the American Paralympic swimmer, has won a total of 23 medals at the Paralympic Games. This includes 13 gold, 8 silver, and 2 bronze medals, making her one of the most decorated athletes in Paralympic history. She has competed in multiple Paralympic Games since her debut in 2004.
Johnny Weissmuller, an Olympic swimmer and star of the 1932 movie Tarzan the Ape Man.
The Tarzan actor who was also an Olympic swimmer was Johnny Weismuller, I believe.