Mr de Periton
Mr de was born about 1146 in Purton, Wiltshire, England.  Mr de is no longer alive.

 Miss de Dumart
Miss de was born about 1145 in Oxhill, Warwickshire, England.  She died before 1219.

 Thomas de Periton
Thomas de was born about 1175 in Ellington, Northamptonshire, England.  He died in 1227.