Born in Nafplion in the Peloponnese, Mercurio was the son of Peter Bua, who belonged to the Albanian noble family of Bua that settled in Peloponnese, and who was the leader of the Albanian community of the region after the fall of the Despotate of the Morea. His uncle Constantine Arianiti, a nobleman of the Holy Roman Empire, was the Count of Montferrat. Due to his martial prowess, he was eventually made Count of Aquino and Roccasecca. In 1519, he married Maria Boccali, the daughter of Niccolò Boccali. Maria died in 1524 leaving one son with the name Flavio. She was buried in Santa Maria di Treviso. In 1525 Mercurio married Elisabetta, daughter of Alvise Balbi. With her Mercurio had four children: Helena Maria, Curio, Polyxena and Alessandro. Elizabeth died in or before 1528. The life of Bua had been dramatised in the works of Tzanes Koronaios. Koronaios, who had been stradiotti-troubadour of Zantiote origin, was a companion of Merkourios Bouas. In his work, a long epic poem in vernacular Greek on the exploits of Merkourios Bouas, Koronaios gives Bua's mythological pedigree, which includes Achilles, Alexander the Great and Pyrrhus. This poem was found in a manuscript in Italy and was published partially by C. Hopf and entire by K. Sathas. It was written in 1519 when Coroneos was in Venice and refers to Bua's history till 1517. It consists of about 4.500 rhyming verses and contains valuable historical information. Coroneos wrote and sent to Bua also a smaller poem of about 125 verses in Greek language, too. Another mention of a Mercurio Bua exists in the Histoire des guerres civiles de France by Enrico Caterino Davila. There a man named Mercurio Bua was active in the service of the king of France in the 1580s. He was present as a commander of a unit of light cavallery at the Battle of Coutras in 1587, leading an ill-fated cavallery charge that led to his unit being diverted away from the decisive action, thus contributing to a catastrophic defeat of the royal army. Nevertheless, it is unknown if it is the same person. M. Bua died in Treviso,, between 1527 and 1562, where earlier he served as captain of a unit of 50 soldiers. He is buried in Santa Maria Maggiore in the same city. In 1562 a marble monument was erected on his tomb, made by Antonio Lombardo. In 1637 the following inscription was made on the monument: "Mercurio Bua Comiti E. Principibus Peloponnesi
Epirotarum Equitum Ductori,
Anno Salu. MDCXXXVII." Which means "To Count Mercurio Bua, Prince of Peloponnesus, Leader of the Epirote Horsemen, Year of our Salvation, 1637". The monument also lists some of his military career.
