Maria d'Aquino (died in 1382) was a Neapolitan noblewoman who is traditionally identified with Giovanni Boccaccio's beloved and muse Fiammetta (Italian for "little flame").
Maria d'Aquino was a “royal bastard”, an illegitimate daughter of Robert the Wise, King of Naples and Count of Provence.
For this Maria was sentenced to death and beheaded in 1382 on the orders of Queen Joanna I's successor, King Charles III.
According to him, Maria's mother was a Provençal noblewoman, Sibila Sabran, wife of Count Thomas IV of Aquino.
She was born after Countess Sibila and King Robert committed adultery at his coronation festivities in 1310, but was given the family name of her mother's husband.