Complex sentence: The eligibility was based on patrilineal relationship, which meant the electing body and the eligibles were agnates with each other; actually the composition and the governance of the clan were built upon male-line descent from a similar ancestor.
Split into simpler sentences: The eligibility was based on patrilineal relationship, which meant the electing body and the eligibles were agnates with each other. The composition and the governance of the clan were built upon male-line descent from a similar ancestor.