Sun Briar (foaled 1915 in France) was a Thoroughbred racehorse voted the American Champion Two-Year-Old Colt of 1917 and the American Champion Older Male Horse of 1919. He was a son of Sundridge, the 1911 Champion sire in Great Britain who also sired Epsom Derby winner Sunstar. Sun Briar was out of the mare Sweet Briar, the daughter of St. Frusquin, a multiple winner of top-level races including the 1896 British Classic and the 2,000 Guineas Stakes. St.