a Welsh humanist scholar who wrote a pioneering Welsh grammar, in Welsh, while in enforced exile with his colleague and fellow-writer Morys Clynnog in Milan in 1567. He was an ardent Roman Catholic. Robert became archdeacon of Anglesey in 1558, but went into exile after the accession of Elizabeth I of England. By 1564 he was in Rome. Later in the 1580s he is thought to have been in Milan assisting Cardinal Borromeo.
