Complex sentence: Nils and Svante Sture, the latter of whom later was elevated to 1st Count of Vestervik and Stegeholm by King Eric XIV and from the second marriage a son Gustaf Johansson who at the same time became count of Enköping (later changed to county of Bogesund).
Split into simpler sentences: Nils and Svante Sture, the latter of whom later was elevated to 1st Count of Vestervik and Stegeholm by King Eric XIV. From the second marriage she had a son Gustaf Johansson who at the same time became Count of Enköping (later changed to county of Bogesund).