Maud De Furnival 
Maud De was born about 1293 in Worksop, Nottinghamshire, England. She was an only child. She died after 1348 in Wethrington, Lincolnshire, England.1 General Notes
REFN: ems-jw
Note: Burke's Peerage has Maud as daughter of Thomas 2nd Lord Furnival, who AR & MCS has as her brother. I think I agree with AR & MCS.
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Children
Joan Marmion
Joan was born about 1310 in Wethrington, Lincolnshire, England. She died in 1362 in Tattershall, Horncastle, Lincolnshire, England.2
1 Ancestral Roots of Certain American Colonists, 7th Edition, by Frederick Lewis Weis, additions by Walter Lee Shippard Jr. @ 218-30
2 Ancestral Roots of Certain American Colonists, 7th Edition, by Frederick Lewis Weis, additions by Walter Lee Shippard Jr. @ 218-31
2 Ancestral Roots of Certain American Colonists, 7th Edition, by Frederick Lewis Weis, additions by Walter Lee Shippard Jr. @ 218-31