Sheila Varian, American horse trainer and breeder (b. 1937)
Sheila Varian (August 8, 1937 – March 6, 2016) was a breeder of Arabian horses who lived and worked at the Varian Arabians Ranch near Arroyo Grande, California. She grew up with a strong interest in horses, and was mentored in horsemanship by Mary "Sid" Spencer, a local rancher and Morgan horse breeder who also introduced Varian to the vaquero or "Californio" tradition of western riding. She started her horse ranch, Varian Arabians, in 1954 with the assistance of her parents. Raising and training horses was her full-time occupation beginning in 1963. She used vaquero-influenced methods of training horses, although she adapted her technique over the years to fit the character of the Arabian horse, which she viewed as a horse breed requiring a smart yet gentle approach.

Varian produced a number of influential Arabian horses whose bloodlines are found in a significant number of winning Arabian show horses in the United States. She began her breeding program with a small number of mares whom she bred to her national champion stallion, Bay Abi. She then acquired three mares from Arabian farms in Poland at a time when that nation was still behind the Iron Curtain and importation of horses to the United States was very difficult. These mares and Bay Abi formed her foundation bloodstock. As of 2016, the Varian horses at stud represent the sixth generation of her stallion breeding line, and her foundation mare lines have produced nine generations of offspring. For her accomplishments, Varian received recognition from the United States Equestrian Federation, as well as several awards from various organizations within the Arabian horse industry. For her contributions as breeder and as a horse trainer in the vaquero tradition, she was inducted into the National Cowgirl Museum and Hall of Fame in 2003.

After she was diagnosed with ovarian cancer in 2013, she sought to place the 230-acre Varian Ranch into a conservation easement to protect the land from development, and in 2015 announced that the California Rangeland Trust would partner with her to purchase the development rights and to allow her long-time ranch manager, Angela Alvarez, to operate the horse breeding program after Varian. After Alvarez, the property would be gifted to the Trust to be sold, the conservation easement running with the land, and the Trust would try to find a buyer that would maintain the Arabian horse breeding program as well. Varian died on March 6, 2016, at age 78.