That's inpossible because there weren't any Seys' in Germany at all ! The name Seys is indiginous to Belgium and a maybe a small part of Zeeland because it borders the Flemish part of Belgium where the name is originated. The name Seys has two origins :1)They came to belgium during the occupation of Spain with the Duke of Alva ae Saeys 2)The name for a small singing bird ae sijs. All the Seys in the world are originally of Belgium ancestry. Thank You.