The title of " Saint " was used quite broadly by British, Irish, and English Christians. Extreme cases are Irish accounts of Gerald of Mayo's presiding over 3300 "Saints" and Welsh claims that Bardsey Island held the remains of 20 000 . [c] More often, the title was given to the founder of any ecclesiastical settlement, which would thenceforth be known as their llan . Such communities were organized on tribal models: founding saints were almost invariably lesser members of local dynasties, they were not infrequently married, and their successors were often chosen from among their kin.  In the 6th century , the " Three Saintly Families of Wales "—those of the invading Irish Brychan and Hen Ogledd 's Cunedda Wledig and Caw of Strathclyde —displaced many of the local Silurian rulers in favor of their own families and clans.  By some estimates,  these traditions produced over 800 pre-congregational saints that were venerated locally in Wales, but invasions by Saxons , Irishmen , Vikings , Normans , and others destroyed many ecclesiastical records. Similarly, the distance from Rome, hostility to native practices and cults, and relative unimportance of the local sees has left only two local Welsh saints in the General Roman Calendar : Saints David and Winifred .