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Male Marmaduke 1st Baron de Thweng , of Kilton Click to view Marmaduke 1st Baron de Thweng , of Kilton in the family tree

Marmaduke 1st Baron de was born in September 1256 in Kilton Castle, Cleveland, Yorkshire, England.  Marmaduke 1st Baron de's father was Marmaduke de Thweng , Lord of Kilton, MP, Sir and his mother was Lucy de Brus.  His paternal grandparents were Robert de Thweng , Lord of Kilton, Sir Knight and Maud Heiress of Kilton; his maternal grandparents were Peter II de Brus , Baron of Skelton & Danby and Hawise de Lancaster. He had a brother and a sister, named Robert de and Joan Elizabeth.  He was the second oldest of the three children.  He died at the age of 66 on September 28th, 1322.

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