At any rate Mainfelin was Maigno's heir. We know two facts about Mainfelin: he was appointed Sherrif in 1125 and he founded Bradwell Priory in 1155. From this latter fact it has been inferred that he ws a very devout man. The Bradwell Priory was never very rich but it did survive until the dissolution of the monasteries in Henry VIII's time. It is thought that Mainfelin died shortly after the foundation.
In the normal course of events Mainfelin could be presumed to have several sons and daughters, but we only know of one, his heir Hamon. Since Hamon is referred to as the son of Mainfelin in documents we are on surer ground in claiming him to be his son. He was born circa 1120 and died circa 1184. The dates would indicate that he may not have been Mainfelin's first born son. Information, such as we have, comes from a 1180 document from the Luffield Priory: