Question: Alonso de Arellano re-discovered the Philippines, after what Portugese explorer who organised the Spanish expedition to the East Indies from 1519 to 1522?

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Alonso de Arellano: Alonso de Arellano was a 16th-century Spanish explorer who commanded one ship out of five fleets that re-discovered the Philippines after the Magellan and López de Villalobos expedition.  Spanish and Philippine historians stated that Arellano actually discovered the Philippines first before Miguel López de Legazpi, splitting off from the rest of the fleet in the galleon patache "San Lucas", piloted by Lope Martín, after leaving the port of Barra de Navidad in Mexico.  Arellano discovered a number of islands in January 1565 and sailed back to Acapulco, becoming the first navigator to established the "Urdaneta's Route" in the Pacific Ocean.  Andrés de Urdaneta was part of the fleet of Arellano, who had separated from the group and discovered the same path afterwards.  Urdaneta kept better documents and maps of the voyage and so the credit was given to him by historians.

Victoria (ship): Victoria (or Nao "Victoria, as well as Vittoria") was a Spanish carrack and the first ship to successfully circumnavigate the world.  "Victoria" was part of a Spanish expedition commanded by the Portuguese explorer Ferdinand Magellan, and after his death during the voyage, by Juan Sebastián Elcano.  The expedition began on August 10, 1519 with five ships but "Victoria" was the only ship to complete the voyage, returning on September 6, 1522.  Magellan was killed in the Philippines.  The ship was built at a shipyard in Gipuzkoa, with the Basques being reputed shipbuilders at the time, and along with the four other ships, she was given to Magellan by King Charles I of Spain (The Holy Roman Emperor Charles V).  "Victoria" was named after the church of Santa Maria de la Victoria de Triana, where Magellan took an oath of allegiance to Charles V. "Victoria" was an 85 ton ship with a crew of 42.

Miguel López de Legazpi: Miguel López de Legazpi (] ; c. 1502 – August 20, 1572), also known as El Adelantado and El Viejo (The Elder), was a Basque-Spanish navigator and governor who established the first Spanish settlement in the East Indies when his expedition crossed the Pacific Ocean from the Viceroyalty of New Spain in modern-day Mexico, arrived in Cebu of the Philippine Islands, 1565.  He was the first Governor-General of the Spanish East Indies which included the Philippines and other Pacific archipelagos, namely Guam and the Marianas Islands.  After obtaining peace with various indigenous nations and kingdoms, Miguel López de Legazpi made Manila the capital of the Spanish East Indies in 1571.  The capital city of the province of Albay bears his name.

Juan Alonso de Guzmán, 1st Duke of Medina Sidonia: Juan Alonso de Guzmán y Suárez de Figueroa Orozco, 1st Duke of Medina Sidonia and 3rd Count de Niebla (in full, Spanish: "Don Juan Alonso de Guzmán y Suárez de Figueroa Orozco, primer Duque de Medina Sidonia, tercer Conde de Niebla, Señor de Sanlúcar de Barrameda, Señor de Lepe, Ayamonte y Gibraltar, Adelantado Mayor de la Frontera de Andalucía" ) (c. 1405 – December 1468) was a Spanish nobleman and military figure of the Reconquista.

Juan Alonso de Guzmán, 1st Count of Niebla: Don Juan Alonso de Guzmán y Cabrera, 1st Count of Niebla or Juan Alonso Pérez de Guzmán y Osorio (20 December 1342 – 5 October 1396) (Sp. :"Juan Alonso de Guzmán y Cabrera, conde de Niebla") was the first Count of Niebla.  He was a descendent of Alonso Pérez de Guzmán.

Ferdinand Magellan: Ferdinand Magellan ( or ; Portuguese: "Fernão de Magalhães" , ] ; Spanish: "Fernando de Magallanes" , ] ; c. 1480 – 27 April 1521) was a Portuguese explorer who organised the Spanish expedition to the East Indies from 1519 to 1522, resulting in the first circumnavigation of the Earth, completed by Juan Sebastián Elcano.

Juan Perez de Zurita: Juan Pérez de Zurita (1516 - c. 1595) was a Spanish Conquistador, the son of Alonso Díaz de Zurita, native of Cañete de las Torres and Inés Fernández de Córdova.  In 1536 he began his military career.  In 1548 he was in Granada and in 1550 he embarked to the Indies with his brother Alonso de Zurita.  In 1553 went on to the kingdom of Peru.  At the beginning of 1557, by order of the Viceroy Hurtado de Mendoza he was sent with an expedition of 700 soldiers under the command of his son García Hurtado de Mendoza, to Chile.  From there by order of the new Governor Mendoza, he was sent with a command of 70 men with the position of Lieutenant Governor and Greater Justice for the province of Tucuman, Juries and Diaguitas.  He crossed the Andes Mountains and arrived at Santiago del Estero in May 1558.

Alonso de Olmedo y Ormeño: Alonso de Olmedo y Ormeño (1626–1682) was a Spanish actor, playwright and writer.  Son of actor and impresario Alonso de Olmedo and Tofino and father of actor and entrepreneur Alonso de Olmedo Escamilla and actor Gaspar de Olmedo.

Domingo Ramírez de Arellano: Domingo Ramírez de Arellano, O.S.H. or Domingo de Villaescusa y Ramírez de Arellano (1568 – 2 July, 1653) was a Roman Catholic prelate who served as Bishop of Yucatán (1652–1653) and Bishop of Chiapas (1640–1652).

Magellan–Elcano circumnavigation: The Magellan–Elcano circumnavigation was the first voyage around the world in human history.  It was a Spanish expedition that sailed from Seville in 1519 under the command of Ferdinand Magellan, a Portuguese, in search of a maritime path from Spain to East Asia through the Americas and across the Pacific Ocean, and concluded by Spanish navigator Juan Sebastian Elcano in 1522.  Elcano and the 18 survivors of the expedition were the first men to circumnavigate the globe in a single expedition.

Supporting paragraphs: Alonso de Arellano Ferdinand Magellan
Answer: Ferdinand Magellan