LIONEL OF AMTWERP, 1st Duke of Clarence was born November 29, 1339 in Antwerp, Belgium and died October 1368 in Alba, Piedmont, Italy of unspecified causes. en.wikipedia.org/wiki/Lionel_of_Antwerp,_Duke_of_Clarence
He married ELIZABETH DE BURGH, 4th Countess of Ulster in 1352. She was born in 1332 and died in 1363. https://en.wikipedia.org/wiki/Elizabeth_de_Burgh,_4th_Countess_of_Ulster
He married VIOLANTE VISCONTI on MAY 28, 1368. She was born 1354 and died November 1386. https://en.wikipedia.org/wiki/Violante_Visconti
Child of LIONEL OF AMTWERP and ELIZABETH DE BURGH
I. PHIPPA PLANTAGENET, 5th Countess of Ulster
b. August 16, 1355 Eltham Palace, Kent, England
d. January 5, 1382 County Cork, Ireland
m. EDMUND MORTIMER 3rd Earl of March in 1368
b. 1352 Llyswen, Breckknockshire, Wales
d. February 1, 1352 Llyswen, Breckknockshire, Wales
He grew to be nearly seven feet in height and had an athletic build.
Betrothed as a child to Elizabeth de Burgh, 4th Countess of Ulster (died 1363), daughter and heiress of William Donn de Burgh, 3rd Earl of Ulster, he was married to her in 1352, but before this date he had entered into possession of her great Irish inheritance. He was called Earl of Ulster from 1347.
Having been named as his father's representative in England in 1345 and again in 1346, Lionel joined an expedition into France in 1355, but his chief energies were reserved for the affairs of Ireland.[4]
Appointed governor of that country, he landed at Dublin in 1361, and in November of the following year was created Duke of Clarence, the third dukedom created in England, while his father made an abortive attempt to secure for him the crown of Scotland. His efforts to secure an effective authority over his Irish lands were only moderately successful. After holding a parliament at Kilkenny, which passed the celebrated Statute of Kilkennyin 1366, he dropped the task in disgust and returned to England.
After Lionel's first wife Elizabeth died in 1363, a second marriage was arranged with Violante Visconti, daughter of Galeazzo Visconti, lord of Pavia. Journeying to fetch his bride, Lionel was received in great state both in France and Italy and was married to Violante at Milan in June 1368. Some months were then spent in festivities, during which Lionel was taken ill at Alba, where he died on 7 October 1368.[4] There was strong speculation at the time that he had been poisoned by his father-in-law,[5] although this has never been proven.
https://en.wikipedia.org/wiki/Lionel_of_Antwerp,_1st_Duke_of_Clarence
http://familypedia.wikia.com/wiki/Lionel_of_Antwerp,_1st_Duke_of_Clarence_(1338-1368)