The year of his birth is calculated from the fact that Antonio Pucci, the town crier of Florence, wrote a poem in Giotto's honour in which it is stated that he was 70 at the time of his death.
Večina strokovnjakov je sprejela dejstvo, da je bilo Giotto njegovo pravo ime, lahko pa bi bila tudi okrajšava za Ambrogio (Ambrogiotto) ali Angelo (Angelotto).