Complex sentence: He was not a male-line descendant of Prince Bernhard and thus not a Prince of Lippe-Biesterfeld, but instead bears the honorific Jonkheer van Amsberg as the son of Claus van Amsberg.
Split into simpler sentences: He was not a male-line descendant of Prince Bernhard and thus not a Prince of Lippe-Biesterfeld. He bears the honorific Jonkheer van Amsberg as the son of Claus van Amsberg.