Sir Adam Mortimer Singer, KBE, JP (25 July 1863 – 24 June 1929) was an Anglo-American landowner, philanthropist, and sportsman, who was one of the earliest pilots in both France and the United Kingdom.
Singer was born in 1863 in Yonkers, New York, to Isaac Singer, the founder of the Singer Sewing Machine Company, and his wife Isabella Eugénie Boyer, a French model. He was the couple's first child, though Isaac had at least eighteen children by a number of previous wives and mistresses. Shortly after Mortimer's birth, his parents moved from New York to Paris, and then, following the outbreak of the Franco-Prussian War in 1870, to Oldway Mansion in Devon, England.
His father died in 1875 and the children, with their mother, inherited substantial wealth. Adam was the eldest of Isabella's children; he had three brothers and two sisters. Of these, his sister Winnaretta married into French nobility and became a patron of the arts, while his brother Washington was a philanthropist and racehorse owner. Singer matriculated at Downing College, Cambridge, in October 1881; his youngest brother, Eugene, would later study at the same college. He left the university without taking a degree. While originally born an American citizen, he naturalised as a British subject in 1900.
Singer's first passion was thoroughbred horses, which he began breeding and racing in 1881. He was also a keen sportsman and a pioneer in the early development of cycling, driving, and flying in Europe. In January 1910, aged 46, he became the twenty-fourth person in France to hold a pilot's certificate from the Aéro-Club de France, and May the eighth person in the United Kingdom to hold one from the Royal Aero Club.