Gallant Sir (foaled 1929) was an American Thoroughbred racehorse bred by renowned horseman Arthur B. Hancock at his Claiborne Farm in Paris, Kentucky. He was sired by the outstanding American Champion sire, Sir Gallahad III. His dam, Sun Spot, was a daughter of Omar Khayyam, the 1917 Kentucky Derby winner and Co-Champion 3-Yr-Old Colt.Norman W. Church purchased Gallant Sir and raced him under his Northway Stable. Trainer E. L. "Lying Fitz" Fitzgerald trained the horse.