Complex sentence: Prior to the 20th century, dynasties throughout the world have traditionally been reckoned patrilineally, such as under the Frankish Salic law.In nations where it was permitted, succession through a daughter usually established a new dynasty in her husband's ruling house.
Split into simpler sentences: Prior to the 20th century, dynasties throughout the world have traditionally been reckoned patrilineally, such as under the Frankish Salic law. Succession through a daughter when permitted was considered to establish a new dynasty in her husband's ruling house.