Abbot Eustacius and Angodus de Lindsei

Can any of your learned readers inform me in what reign an Abbot *Eustacius* flourished? He is witness to a charter of Ricardus de Lindsei, on his granting twelve denarii to St. Mary of *Greenfeld*, in Lincolnshire: there being no date, I am anxious to ascertain its antiquity. He is there designated "*Eustacius Abbe Flamoei*." Also witnessed by Willo' decano de Hoggestap, Roberto de Wells, Eudene de Bavent, Radulpho de Neuilla, &c. The latter appears in the Doomsday Book. The charter is to be found among Ascough's Col., B. M. I should also be glad to know whether the Christian name *Angodus* b…