She is married to Henry of Grosmont Earl of Derby and Leicester 1st Duke of Lancaster of Grosmont 4th Earl.
They got married about 1337 at Lancashire, England.
Child(ren):
Isabel of Grosmont (born de Beaumont)<br>Also known as: Elizabeth of BeaumontIsabel of Beaumont<br>Gender: Female<br>Birth: 1320 - England<br>Marriage: Circa 1337 - Lancashire, England<br>Death: From Mar 24 1361 - England<br>Burial: Church of The Annunciation of St. Mary, Leicester, Leicestershire, England<br>Title of Nobility: Duchess of Lancaster - 1337 - England<br>Parents: Henry de Beaumont 4th Earl of Buchan Jure Uxoris, Alice de Beaumont (born Comyn)<br>Husband: Henry of Grosmont 1st Duke of Lancaster<br>Children: Maud of Lancaster, Countess of Leicester, Blanche of Lancaster of Gaunt<br>Siblings: Catherine de Beaumont, Thomas de Beaumont, Alice de Beaumont, John de Beaumont 2nd Lord Beaumont, Joan De FitzWarin (born Beaumont), Agnes de Lucy (born de Beaumont), Lady Joice de Grenville (born De Beaumont - Grenville), Elizabeth de Beaumont<br> Additional information:
LifeSketch: Isabel de Beaumont, Duchess of Lancaster, of the House of Brienne (c.?1320 – 1361) was an English noblewoman, being the youngest daughter and child of Henry de Beaumont, Earl of Buchan and Alice Comyn.d nine older siblings, including John de Beaumont, 2nd Lord Beaumont. Isabel's paternal grandparents were Louis of Brienne, Viscount de Beaumont, and Agnes, Viscountess de Beaumont. Her maternal grandparents were Alexander Comyn, Sheriff of Aberdeen and Joan le Latimer. Louis of Brienne was a younger son of John of Brienne by his third wife, Berengaria of Leon while Alexander Comyn was a younger brother of John Comyn, Earl of Buchan.r's estates:45 – 12 September 1369), married John of Gaunt, son of Edward III of England, by whom she had three surviving children. Blanche inherited all her father's estates after the death of her sister.ands's Royal House of Lancaster, with Henry IV of England being her grandson. Philippa of Lancaster, Queen of Portugal and the Algarve and Elizabeth of Lancaster, Duchess of Exeter were also her grandchildren.glish Royal House of Lancaster, with King Henry IV of England being the couple's grandson.
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