Complex sentence: The Kinsky family were members of the Bohemian aristocracy, in 1628 he was elevated to Count (in the Czech peerage) when the Wallenstein Family, to which he was connected were ennobled.
Split into simpler sentences: The Kinsky family were members of the Bohemian aristocracy. In 1628, he was elevated to Count in the Czech peerage when the Wallenstein Family, to which he was connected, were ennobled.