Roger de Quincey, 2nd Earl of Winchester
Roger was born before 1202.  He died on April 25th, 1264.

 Helen de Galloway

 Margaret de Quinci
Margaret was born about 1218 in Winchester, Hampshire, England.  She died before March 12th, 1284.

 Elena de Quincy
Elena was born about 1220.  She died about 1296.

 Elizabeth de Quincy
She died in April 1282.