Windfall is registered with the Trakehner Verband, despite only having one grandparent with East Prussian Trakehner bloodlines, his sire's dam "Hallo".
Windfall's dam, Wundermaedel xx, was an approved "Elite Mare" in the Trakehner Verband studbook, being one of only 3 Thoroughbred mares to earn the "elite" status, out of a total of 110.