He is married to Matilda "Maud" de CHAWORTH, COUNTESS OF LANCASTER.
They got married on March 2, 1297 at Kidwelly, Carmarthenshire, Wales, he was 16 years old.Source 2
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Name: Henry 'Wryneck' 3rd Earl of Lancaster Plantagenet birth date: 1281 birth place: Grismond Castle, Monmouth, England death date: 22 Sep 1345 death place: Monastry of Cannons, Leicester, Leicestershire, England/ Ancestry.com