Baron John Deincourt
John was born in 1220 in Blankney, Lincolnshire, England.  John is no longer alive.

 Agnes deNeville
Agnes was born in 1226.  She died at the age of 67 on July 20th, 1293.

 Margaret deDeincourt
Margaret was born in 1256 in Blankney, Lincolnshire, England.