Joan , Lady of Wales and Lady of Snowdon, also known by her Welsh name of Siwan
Siwan , Lady of Wales and Lady of Snowdon, also known by her Welsh name of Siwan was born about 1191, possibly in France. She is the “natural” daughter of John of England and “Queen” Clemance Pinal (though some records claim that Agatha
daughter of Robert, Earl Ferrers is her mother), that ladies and gents means she was bastard born, oh and that Queen was probably a nicety as there is no proof that mom was of noble birth. She was most likely brought to England from Normandy in December of 1203 for her marriage to Prince Llywelyn ab Iorwerth, for those who haven’t run into many Welsh names his name isn’t out of the norm. Supposedly he built a church for his bride at Trefriw so that she didn’t have to walk so far though the mountains.
The two married sometime between December 1203 and October 1204 in St Werburgh’s Abbey in Chester. The couple had at least two children together and she may have been the mother of any of his four others. One of those possible children, Gwladus Ddu, married Ralph de Mortimer as her second husband, so this may also be a twice over relative.
In 1210 Llywelyn and his father in law got into a bit of a tiff that ended up in a rebellion that ended up causing many of Llewyln’s troops to starve. He retreated but not till after burning Bagnor. Siwan was sent to try to smooth things over with dad which worked for awhile. In 1212 war was blazing again and John came to Nottingham to put the rebellion down on August 14. That day at dinner he received a letter from Siwan (and the King of Scotland) warning him that there were traitors in his midst who would ensure he had an accident if he invaded Wales. He backed away from the invasion, sent young Prince Henry to safety, recalled his barons and then sent letters to those he suspected informing them that he expected hostages. He did find two of the traitors this way.
In April of 1226 Pope Honorius III legitimized Siwan since neither or her parents were married to others when they had her. However, it still kept her out of the line of succession for the English throne.
Being married didn’t stop Siwan from having an affair of her own. On Easter Sunday 1230, Siwan was caught with William de Braose in her bedroom. He was a Anglo-Norman Marcher Lord who had been taken prisoner by Llywelyn and was being held for ransom as part of that ransom Llywelyn and Siwan’s son, Dafydd, to Braose’s daughter Isabella. He was hung on May 2, but the wedding still occurred. She was put under house arrest for year during which she may have had a daughter. But, at the end of the year all was forgiven and she returned to her husband’s favor.
She died February 2, 1237 at home at Abergwyngregyn along the coast of Gwynedd. Llywelyn’s grieved so deeply over the loss that he founded a Franciscan friary on the seashore at Llanfaes, opposite the royal home, in her honor. The friary was consecrated shortly before Llywelyn died in 1240.
Though not confirmed it is believed that her coffin may have been used as a horse trough after Henry VIII dissolved the monasteries.