 Her sire was Luke McLuke, who won the 1914 Belmont Stakes and was a son of the important but unraced Ultimus, who was sired by Commando.From the mare La Venganza, Nellie Morse's damsire was the Australian multi-race winner Abercorn.Owned by the prominent American cartoonist Bud Fisher, Nellie Morse was trained by Albert B. Gordon.