Diogo Soares de Albergaria (Spanish: Diego Suarez de Albergaria), also known as Diego Soares de Melo, Diego Suarez de Melo and the "Galego", was a 16th-century Portuguese navigator and explorer.

Soares arrived to India c. 1538,^[1] where he was a known murderer and pirate. Estêvão da Gama, by then Governor of Goa, issued a warrant for Soares's arrest, but Soares was later granted a pardon by Da Gama's successor, Martim Afonso de Sousa,^[2] who was a friend of Soares.^[3] Under De Sousa's rule, Soares commanded expeditions while at the same time continuing his pirate activities near Portuguese Mozambique.^[1]

At the beginning of the 16th century, a Portuguese squadron of 13 ships crisscrossed the Indian Ocean. One of these ships went adrift, and its captain, Diego Diaz, was therefore the first European to discover the Big Island on 10 August 1500. In February 1506, Admiral Herman Suarez recognized the place and so Antomabokala, former capital of Ankarana, acquired its name of Diego Suarez, which comes from the contraction of the first name of the captain and the name of the Admiral. In 1635, the bay was mentioned for the first time under this name by the French pilot Berthelot, author of an oriental map of Africa and Madagascar. In 1824, the bay was explored by the English hydrographer Owen, then in 1833, Captain Bigeault, commandant of La Nièvre, traveled the North East coast to carry out hydrographic surveys. But this harbor, which is perfectly situated on the route to India, does not fail to interest the European nations and by the Franco-Malagasy treaty of 17 December 1885, France is authorized to occupy Diego Suarez.^[4]

Soares landed in Portuguese Malacca in 1547,^[1] driven by the weather.^[2] There he stayed under the orders of Tabinshwehti, King of the Burmese of the Toungoo dynasty. There, Soares became wealthy, worth four million in jewels and other valuables, had a pension of 200,000 ducats yearly, was called the king's brother, and was supreme governor of the kingdom and general in chief of the army.^[1]

During the Burmese–Siamese War (1547–1549), Soares commanded a force of five captains and 180 professional mercenaries,^[5] he also led the failed invasion and siege of Tapuram, which ended after five months after 120,000 Peguans deserted when their leader Xemindoo (Smim Htaw) rebelled in their native Pegu, but also as a revenge for the mistreatment by Soares, who was his general in chief.^[1]

While still King Tabinshwehti's general, Soares tried to take off by force the daughter of a rich merchant, in the process he killed the groom and others who came to her rescue, and the bride committed suicide to avoid the dishonour. Soon afterwards, the King was killed and replaced by one of his generals called Zemin (Smim Sawhtut), who eventually handed Soares to the city of the disgraced bride, there the people stoned Soares to death, plundered his house, and as much less treasure was found, he was believed to have buried the rest.^[1] The episode of his death is described in the book Peregrinação by Fernão Mendes Pinto.

In 1963, botanist René Paul Raymond Capuron published a genus of flowering plants belonging to the family Bixaceae, from Madagascar as Diegodendron and named in his honour and due to his links with the island.^[6]

• Burmese–Siamese War (1547–49)

• Mendes Pinto, Fernão (1989). Catz, Rebecca D (ed.). The Travels of Mendes Pinto. Chicago: The University of Chicago Press. ISBN 0-226-66951-3.

• Kerr, Robert (2004) [1st. pub. Wm. Blackwood, Edinburgh & T. Cadell, London:1824]. A general history and collection of voyages and travels, arranged in systematic order: forming a complete history of the origin and progress of navigation, discovery and commerce, by sea and land, from the earliest ages to the present time. Chapel Hill, NC: Project Gutenberg. Retrieved 30 December 2012.

• do Couto, Diogo; de Barros, João & Severim de Faria, Manoel (1777–80). Da Asia de João de Barros, dos feitos que os Portuguezes fizeram no descubrimento e conquista dos mares e terras do Oriente. Lisbon: Na Regia Officina Typografica Lisboa. Retrieved 30 December 2012.

• Van Den Boogaerd, Pierre (2009). Shipwrecks of Madagascar. New York: AEG Publishing Group. ISBN 978-1-60693-494-4.