Commentary Purg XIV 106

Of Federigo Tignoso practically nothing is known.  Benvenuto says he was a rich nobleman of Rimini and that he had heard tell that Federigo had a great shock of yellow hair, so that his sobriquet, Tignoso, which is the adjective from the noun tigna (or 'mange'), was a playful misnomer.  Federigo's companions were, apparently, those who took part in his hospitable way of life.  Those who attempt to date his life set it in the first half of the thirteenth century.