Commentary Par XII 80-81

Bosco/Reggio (DDP Bosco.Par.XII.80-81) say that Dante, in the life of Dominic by Theodoric of Appoldia, could have read that his mother's name, Giovanna, meant 'grace of God,' or 'full of grace.'  Theodoric's source (and Dante's) may have been, says Torraca (DDP Torraca.Par.XII.79-81), Uguccione da Pisa.