Bay Ronald, Foaled 3 May 1893, at Leybourne Grange Stud in Kent, England) was a thoroughbred racehorse that had a huge impact on the breeding of sport horses, mainly through his son Dark Ronald and grandson Teddy, and also carried on his lines in theThoroughbred racing world, through his son Bayardo. He appears in the pedigrees of many dressage, show jumping, and eventing horses today.