GUYOMAR [IV] ([before 1155]-[14 Mar 1216/18]). "Guidomarus…Leonensis dominus et uxor suo Nobilis filiique sui Guidomarus et Herveus" founded the abbey of Daoulas by undated charter[637]. Robert of Torigny records that "Hamo episcopus Leonensis" was killed in 1171 "per consilium ut dicunt Guihomari fratris sui vicecomitis Leonensis et junioris Guihomaris nepotis sui"[638]. The birth date of Guyomar [IV] is estimated on the assumption that he was a young adult at the time of this murder. Ralph de Diceto´s Ymagines Historiarum record that “in minori Britannia Hamo Leonensis episcopus” was killed “per Guidomarum filium fratris sui Guidomari”[639]. Robert of Torigny records that "Guihummaro iuniori" was granted eleven parishes out of his father's territories after the castle of Léon was captured in 1179[640]. King John granted safe conduct to "Guiomar de Leonibus et Maencia uxor eius" by order dated 14 Mar 1216[641]. m MARGILIA, daughter of --- (-after 1218). King John granted safe conduct to "Guiomar de Leonibus et Maencia uxor eius" by order dated 14 Mar 1216[642]. Her marriage is confirmed by the Chronicon Britannicum which records the death in 1218 of "Herveus de Leonia, filius Margiliæ, de transmarinis partibus redeundo"[643]. Guyomar [IV] & his wife had [two] children