How did hereditary bardic families preserve Irish literature after the 12th century?

After the 12th century, hereditary bardic families became the primary custodians of Irish literature, maintaining this role until the collapse of the Gaelic polity. Their preservation efforts involved several key practices:1

• Professional Training: Bards underwent rigorous training, typically lasting six or seven years, to master the complex requirements of their craft.2
• Literary Reform: They modernized the language and refined verse forms, reducing the vast number of meters used by the earlier filid while enforcing stricter rhythmic control and ornamentation.2
• Patronage: Bards operated independently of monastic foundations, relying on noble patrons to secure their living. Their work focused heavily on eulogizing these patrons or God.2
• Ecclesiastical Connection: Although initially separate from the church, bardic families eventually began sending their sons into religious orders, particularly the Franciscans. By the end of the period, these religious orders became the greatest custodians of the tradition.1
• Stylistic Innovation: They incorporated new themes, such as courtly love introduced by Norman invaders, and utilized the crosánacht style, which blended verse with humorous or satirical prose.2