Hello! If you go to the site : www.familysearch.org
Put in Beata Pictorius, select : any , Then select : all 8 results,
You will see two Eriks, one is Tawast, and, has a son Jacob Pontus born 1666 in Pietarsaari with Beata......the other is Tawastsjerna, and, they have a daughter named Christina...you can see why there has been confusion, is it bad record keeping? Who knows? I hope this helps.