What i can find:
Paphiopedilum Wössner Favourite = the cross between Paph. godefroyae forma leucochilum with Paph. hangianum
Paphiopedilum godefroyae = LEUCOCHILUM "DARK" X PAPHIOPEDILUM HANGIANUM "SELECTED"
Paph Nathaniel's KY = Paphiopedilum hangianum x leucochilum...