Wijerd Jelckama (c1490-1523)

I am looking for decendents of Wijerd Jelckama. Het was a legendary freedom fighter, folk hero and warrior. Lived from 1490-1523. Died of decapitation in the Frisian city of Leeuwarden after being caught. Was executed as a traitor and rebel leader. His death ended the rebellion of the Frisians in the North of the Low Countries (Belgium, Netherlands). I know he was relatively young (33) when he died, but he was married at the time of his death. I want know if there are any decendents of Jelckama. I am looking for his decendents. Can anyone tell me: A familytree would be awesome.The name, by the way, is also spelled as "Wijard Jelckama", "Wierd Jelckama" or "Grutte Wierd". The last one is his nickname, translating into "Great Wijerd" for his great size. At the height of 7 feet and strong enough to carry a 1000-pound horse on his mighty shoulders, "Big Wierd" must have made quite an impression.
 * 1) Who his wife was
 * 2) Who their children were, if any
 * 3) Were they were born, were they died, and who their children were

He was the nephew of the famous Pier Gerlofs Donia.