Lord John De Marmion
Lord John was born about 1287 in Danfield, Yorkshire, England.  He died on April 30th, 1335.

 Maud Furnival
Maud was born about 1292 in Tattershall, Lincolnshire, England.

 Joan De Marmion
Joan was born about 1313 in Tanfield, Yorkshire, England.  She died in 1362.

 Avice De Marmion
Avice was born about 1318 in Tanfield, Yorkshire, England.