Lawrence De St. Martin
Lawrence was born about 1273 in Littlecote Park, Wiltshire, England.

 Sybil Lorty
Sybil was born about 1295 in Axford, Marlborough, Wiltshire, England.  She died in 1349.

 Sybil De St. Martin
Sybil was born about 1318 in Littlecote Park, Wiltshire, England.  She died in 1386.