Henry de Urtiaco
Henry was born before 1285 in Curry Rivell, Somersetshire, England.  He died in 1321.

 UNKNOWN Sibyl
UNKNOWN was born before 1285 in Curry Rivell, Somersetshire, England.  She died before 1322.

 Joan de Urtiaco
Joan was born about 1299.  She died after 1318.