John de Marmion
John was born in 1287.¹   He died at the age of 48 on April 30th, 1335.¹ 

 Maud de Furnival
Maud was born in 1285 in Sheffield, Yorkshire, England.²   She died at the age of 75 on February 20th, 1360.¹ 

 Joan de Marmion
Joan was born in 1310 in Wetherington, Lincolnshire, England.³   She died at the age of 52 in 1362 in Tattershall, Horncastle, Lincolnshire, England.³ 

 Avice de Marmion
Avice was born in 1312.¹   She died at the age of 66 on March 20th, 1378.¹