Captain Royal Leonard (April 3, 1905 - June 21, 1962), a Texan pilot who previously flew for TWA, was, in 1935-1941, the personal pilot of Generalissimo Chiang Kai-shek.
Juan Terry Trippe (June 27, 1899 – April 3, 1981) was an American commercial aviation pioneer, entrepreneur and the founder of Pan American World Airways, one of the iconic airlines of the 20th century.
 He was instrumental in numerous revolutionary advances in airline history, including the development and production of the Boeing 314 Clipper, which opened trans-Pacific airline travel, the Boeing Stratocruiser which helped to pioneer cabin pressurization, the Boeing 707 which launched the Jet Age, and the Boeing 747 which introduced the era of jumbo jets (evolved from Air Force bombers, tanker and transport design, respectively).
 Trippe's signing of the 747 contract coincided with the 50th anniversary of Boeing, and he gave a speech where he explained his belief that these jets would be a force that would help bring about world peace.
Henry Tyndall "Dick" Merrill (February 1, 1894 – October 31, 1982) was an early aviation pioneer.
 Among his feats he was the highest paid air mail pilot, flew the first round-trip transatlantic flight in 1936, was Dwight D. Eisenhower's personal pilot during the 1952 presidential elections, set several speed records, and would go on to be Eastern Air Lines' most experienced pilot with over 36,000 hours until his retirement in 1961.
 In total, Merrill flew over 45,000 hours as pilot in command, covering over eight million miles.
Albert Edwin Elworthy Lee Tucker, often referred to as Albert Lee Tucker, (16 March 1843 – 8 May 1902) was an Australian politician, member of the Victorian Legislative Assembly.
Charles Rankin Bond, Jr. (April 22, 1915 – August 18, 2009) was an American pilot and United States Air Force officer.
 He served with the Flying Tigers in Burma and China during World War II.
 He was shot down twice and was credited with shooting down nine and a half Japanese airplanes.
 He later served in the Soviet Union as an aide and personal pilot to W. Averell Harriman.
 He rose to the level of brigadier general and, during the Vietnam War, he was the deputy commanding officer of the 2nd Air Division in Vietnam and the 13th Air Force in the Philippines.
 He retired from the United States Air Force in 1968 as commander of the Twelfth Air Force.
 In 1984, Bond's diary of his service with the Flying Tigers was published and became a bestseller.
Albert Lee "Al" Ueltschi (May 15, 1917 – October 18, 2012) is considered the father of modern flight training and was the founder of FlightSafety International.
 Ueltschi was once personal pilot to Juan Trippe and an associate to Charles Lindbergh.
 On July 21, 2001, he was enshrined at Dayton, Ohio, in the National Aviation Hall of Fame class of 2001, along with test pilot Joe Engle, United States Air Force flying ace Marion Carl, and USAF ace Robin Olds.
 In 2013, "Flying" magazine ranked Ueltschi number 13 on its list of the "51 Heroes of Aviation".
Albert Lee Giddens is a Texas trial lawyer.
 His firm made its name handling plaintiff's litigation, representing clients suing for wrongful death and personal injuries throughout the state of Texas.
 Giddens is Board Certified in both Personal Injury and Civil Trial Law by the Texas Board of Legal Specialization.
Charles (Charlie) Johnson is a former president of Cessna Aircraft.
 He was born in 1942 in Georgia and grew up in Memphis.
 He has always been passionate about technology.
 Because he was also passionate about flight, he joined the Air Force.
 He fought in the Vietnam War flying the T-33, T-37, T-38, and the F-105.
 After the Vietnam War he continued with his love of flying.
 Johnson was a personal pilot for Arnold Palmer.
 After this he became a test pilot for Learjet.
 Soon after he rose through the ranks of Cessna to President and COO of Cessna Aircraft.
 Johnson joined Bye Aerospace in 2014 and was inducted into the Colorado Aviation Hall of Fame the same year.
 He has just recently been inducted into the Kansas Aviation Hall of Fame.
 Johnson continues to fly and has a love of cars.
SS-Gruppenführer Johannes Baur began his military career as a World War I flying ace credited with six aerial victories.
 He became Adolf Hitler's personal pilot in the 1930s.
 During World War II, he rose to the rank of Generalleutnant.
Hans Baur (19 June 1897 – 17 February 1993) was Adolf Hitler's pilot during Hitler's political campaigns of the early 1930s.
 He later became Hitler's personal pilot and leader of the "Reichsregierung" squadron.
 Apprehended by the Soviet Union at the end of World War II in Europe, he was imprisoned in the USSR for ten years before being extradited to France on 10 October 1955, where he was imprisoned until 1957.
 He died in Herrsching, Bavaria, in 1993.

Question:  Albert Lee Ueltschi, was once personal pilot to which American?
Answer: Juan Trippe