from https://en.wikipedia.org/wiki/Josce_de_Dinan

Josce de Dinan (died 1166) was an Anglo-Norman nobleman who lived during and after the civil war between King Stephen of England and his cousin Matilda over the throne of England. He was a landholder in the Welsh Marches when he was married by Stephen to the widow of Pain fitzJohn, a union that gave Josce control of Ludlow Castle. Josce eventually lost control of Ludlow and was granted lands in compensation by Matilda and her son, King Henry II of England, who succeeded Stephen in 1154. MORE...

from http://fmg.ac/Projects/MedLands/brittcope.htm#JoscleiinDinanMSibyll...

JOSCELIN . A charter dated 1108 records the foundation of the priory of Saint-Malo de Dinan by "Gaufredus Dinanensis dominus…[et] filius eius Oliverius", with the consent of "uxore eius Radegunde…cognominata…Oriel et filiis suis Willelmo, Rollando atque Goscelin"[742]. The 1156 and 1157 Pipe Rolls records "Josce de Dinan" in Berkshire, "in Lamburna" yielding ₤66 (1156) and ₤76 (1157)[743]. The Historia sancti Petri Gloucestriæ records that "Jozo de Dynan" donated “terram xvii solidorum in Lamborne…" on becoming a monk at St Peter’s, that "Sibilla filia Jazonis" confirmed her father’s donation and donated further property[744].

m (after 1138) SIBYLLA de Lacy, widow of PAYN FitzJohn, daughter of --- (-after [1140]). “Sibilla de Lacy” notified her bailiffs and foresters that she had donated “land of Leghe near the church of St Michael” to “my uncle Walter abbot of Gloucester”, for the souls of “myself and my husband Payne Fitz-john”, by charter dated to [1130/39][745]. "Rogo filio Milonis Gloec et Cecilie uxori sue filie Pag fil Johis" the lands of her father, including land which "Pag dedit Sibille uxoris sue in dote", by charter dated to [Dec 1137/May 1138][746]. Roger Bishop of Salisbury instructed "Sibille q fuit uxor Pag fil Johis" to restore property which her husband had granted to "Rogo fil Milon Gloec cum Cecilia filia tua p-mogenita" by charter dated 1138[747]. Her second marriage is confirmed by two charters of St. Guthlac’s priory, Hereford: in the first, “Sybil de Laceo” donated land at “Parva Frome” in Herefordshire, while in the second Sibylla “domina de Lodel” donated further land in the same place “ex proprio jure hereditare mee” with the consent of “domini mei Gozonis de Dinan”[748]. It is assumed that Sibylla survived for at least two years after her second marriage as her second husband is recorded as having had two children. No source has been identified which confirms that Sibylla was their mother, although the naming of the younger child after her is indicative. Joscelin & his wife had two children:

i) HAWISE de Dinan ([1140/50]-1226 or after).

ii) SIBYLLE de Dinan (-1212).