Robert De Ros
He died on May 17th, 1285.

 Isabel De Albini
She died on June 15th, 1301.

 Mary De Ros
Mary was born in 1253.  She died at the age of 73 on May 23rd, 1326.

 William De Ros
William was born in 1368.  He died at the age of 46 on September 1st, 1414.

 Joan De Ros
She died on October 13th, 1348.