William De Plumpton
William was born about 1294 in Plumpton, Yorkshire, England.  He died in 1362.

 Christiana Mowbray
Christiana was born about 1305 in Plumpton, Yorkshire, England.  She died on December 25th, 1362.

 Robert Plumpton
Robert was born about 1340 in Plumpton, Yorkshire, England.  He died on April 19th, 1407.

 Alicia Plumpton