Robert de Leybourne
Robert de was born about 1165 in Leybourne, Malling, Kent, England.  He died in 1199.

 Margaret
Margaret was born about 1170 in England.  She died about 1223.

 Roger de Leybourne , Lord of Berwick
Roger de was born before 1193 in Bures, Sudbury, Essex, England.  He died about 1251 in Great Berwick near Shrewsbury, Shropshire, England.