Friesian Sporthorse™ is a registered trademark of the Friesian Sporthorse Association. Friesian Sport Horse is often used as a generic term to describe any Friesian crossbred, regardless of the breeding or registry affiliation.embers should be wary of other registries representing themselves as registries for Friesian Sporthorses -- if your horse is not registered with the FSA it is not officially a Friesian Sporthorse.