Complex sentence: The leader of the uprising was Hendrik Koekoek, nicknamed Boer Koekoek ("Farmer Koekoek "), whose political party, Boerenpartij ("The Farmers Party") gained a lot of popularity as a result of the incident.
Split into simpler sentences: The leader of the uprising was Hendrik Koekoek who was nicknamed Boer Koekoek ("Farmer Koekoek "). His political party, Boerenpartij ("The Farmers Party"), gained power and influence as a result of the incident.