Robert Marmion de Grey
Robert was born in 1345.¹   He died at the age of 22 on November 30th, 1367.¹ 

 Lora St. Quintin
Lora was born in 1342.¹   She died at the age of 27 in 1369.¹ 

 Elizabeth Grey
Elizabeth was born in 1365 in Ravensworth, Yorkshire, England.  She died at the age of 62 on December 14th, 1427 in Rotherfield, Oxford, England.