The Chronicle of Alberic de Trois-Fontaines names "Radulfum de Esselduno qui fuit comes Augi" as "Hugo Brunus fratrem natu maiorem"..., adding that "horum pater Hugo de Lisegnen" had "fratres…Gaufridum, Henricum regem Cypri et Guidonem regem Ierosolimorum". "Maiorem" is presumably an error in this source for "minorem", or represents a transcription error: no scenario has been identified in which Raoul being the older brother is compatible with the other information relating to the Lusignan family. According to the Complete Peerage, "Esselduno" was "Exoudun, Deux-Sèvres, arrondissement Melle, canton La Mothe-Saint-Héray" not "Issoudun, Indre", although the editor of the Monumenta Germanica series states that the place was "Issoudun, départ. Indre".
Comte d'Eu, Seigneur d'Exoudun, de Melle, et de la Mothe-Saint-Héray. The date of the marriage and Raoul’s succession as count is uncertain. It must have taken place before 1194 when "comes de Auco" paid scutage on land in Sussex. "Radulfus Augensium comes" confirmed donations to Tréport, made by "antecessores mei comes…Robertus et Guillelmus filius eius et Henricus avus Henrici junioris et Johannes pater eiusdem Henrici et idem H.", by charter dated 1191, indicating that the marriage took place some years earlier assuming that this document is correctly dated. The Annals of Burton record that “Warinus de Clapiun senescallus Normanniæ” besieged “castellum de Denecurt”, on the orders of John King of England, adding that King Richard had given the castle to “Radulpho de Ysoudun comiti de Aueo, fratri Hugonis le Brun”, but that the siege was lifted by Philippe King of France before the arrival of King John. The same passage is given by Roger of Hoveden. "Hugo Brunus comes Marchie", on leaving for Jerusalem, recommended "R. comiti Augi et Hugoni filio meo" to take the abbey of Châtelliers under their protection by charter dated to [1200]. "Hugo Brun com March et Rad com Augi" swore homage to John King of England, dated 28 Jan 1200. Ralph of Coggeshall records that in 1202 John King of England made war against "comitem de Marchis…Hugonem cognomento Brun et fratrem eius comitem de Eu" who had rebelled against him "pro filia comitis Engolismi, quam Hugo prædictus prius affidaverat".
Seigneur de Civray et de Chizé: an order of King John dated 2 Nov 1202 refers to "gentes Com Augi de Siveray et de Chisie". An order of King John dated 7 Nov 1202 granted safe passage for a visit to "R. com Augi". "Comes Augi" pledged his lands for his homage to Philippe II King of France, and that of "fratres sui comes Marchie et vicecomes Castri Eraudi" dated (by Delisle) to [1209].
His date of death is indicated by the following document: the mayor and commune of Niort wrote to King Henry III, dated Feb/Mar 1220 (O.S.?), notifying the death of certain persons including “le comte d’Eu, monseigneur Porteclie, messeigneurs Geoffroy du Taunay, A. de Rochefort, Pans de Mirebeau et monseigneur Ceebranz Chaboz” leaving heirs “qui sont en bas âge”. The necrology of Ulterioris Portus monastery records the death "1 May" of "Radulphus comes Augi". 1
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