Pier Gerlofs Donia
In 1791, Jacobus Kok wrote that above the porticus of the New City Hall of Leeuwarden, two remarkably large swords were found which were said to have belonged to Grutte Pier and Wijerd Jelckama. Donia was noted for the ability to wield this great sword so efficiently that he could behead multiple people with it in a single blow.
Today, a great sword that is said to have belonged to Pier is on display at the Fries Museum in Leeuwarden. It measures 2.15 metres (7 ft) in length and weighs about 6.6 kilograms (14.6 lb). Some sources put his height at 7 ft. Pier was alleged to be so strong that he could bend coins using just his thumb, index and middle finger. A huge helmet said to be Grutte Pier's is kept in the town hall of Sneek.
Pier's son Gerloff died unmarried and left no issue. His daughter Wobble married three times, lastly to one Popta by whom she had issue. Therefore Donia left no descendants in male line, but has many descendants through his daughter.
wiki