Justo Takayama Ukon, also known as Dom Justo Takayama, was a Japanese Catholic daimyō and samurai during the Sengoku period marked by strong anti-Catholic sentiment. Born as Takayama Hikogorō in 1552/1553, he was baptized into the Catholic Church at the age of 12 and later renewed his faith after a coming-of-age ritual. Takayama renounced his samurai status to devote himself to Christianity and was eventually exiled to Manila, where he passed away two months later. His cause for sainthood began after his death, and he was beatified by Pope Francis in 2016.Takayama was the eldest son of Takayama Tomoteru, the lord of Sawa Castle in the Yamato Province. He participated in significant battles and secured his position as a daimyō. Despite his influential role, he faced hostility towards the Christian faith and chose to maintain his beliefs, resulting in his expulsion from Japan. He arrived in Manila and declined offers of power and influence, choosing a humble path until his passing in 1615.Several statues and memorials honor Takayama, including a statue at Plaza Dilao in Manila and another at the University of Santo Tomas. His cause for sainthood has been initiated, reflecting his enduring legacy and impact.

Justo Rufino Barrios Auyón (19 July 1835 – 2 April 1885) was a prominent Guatemalan politician and military general who held the presidency of Guatemala from 1873 until his passing in 1885. Barrios was recognized for his progressive reforms and endeavors to reunite Central America. He exhibited exceptional intellect and vigor from an early age, pursuing a legal career in Guatemala City and later serving as a lawyer. Barrios rose to power through his involvement in the revolt in western Guatemala, earning distinction as a capable military leader and ultimately attaining the rank of general in the rebel army. His ascendancy to the presidency followed the successful overthrow of Guatemala's long-standing Conservative administration. Barrios pursued liberal reforms with great zeal, including the definitive separation of church and state, expulsion of regular clergy, establishment of civil marriage, secular cemeteries, and the promotion of secular education and free elementary schooling. He implemented an extensive administrative restructuring, oversaw the reconstruction of Guatemala City, and introduced vital infrastructure such as telegraph lines and railroads. Barrios also initiated economic measures involving the redistribution of land and labor regulations to support the burgeoning coffee industry. His presidency was marked by strong authoritarianism, leading to the incarceration and torture of political opponents, along with the expulsion of many individuals from the country. Despite his controversial methods, Barrios left a lasting impact on Guatemala's political and social landscape during his tenure.

Justo Pastor Benítez (28 May 1897 — 7 February 1963) was a Paraguayan historian, writer, and Liberal politician known for his influential works and political contributions. Born in Asunción, he was an active member of the Liberal Party and played a significant role in advocating for fair monitoring of the Chaco War by the League of Nations. Benítez held various political positions, including serving as Foreign Minister and representing Paraguay in international affairs. His extensive bibliography includes works such as "Bajo el signo de Marte," focusing on the Chaco War, and "La Revolucion Paraguaya del 15 de mayo de 1811: Ensayo de interpretacion," offering historical insights. Despite declining the ambassadorship to Bolivia and residing in Brazil in his later years, Benítez's legacy as a dedicated historian and politician continues to be celebrated. He left a lasting impact through his literary contributions and his dedication to the Liberal Party's principles.

Justo Apu Sahuaraura Inca, born around 1770 in Cusco, was a prominent Incan noble and a key figure in the Peruvian independence movement. Descended from noble lineage, he pursued his education at prestigious institutions, including the College of San Francisco de Borja and the National University of Saint Anthony the Abbot in Cuzco. Sahuaraura Inca excelled in his studies, obtaining a doctorate and serving in various ecclesiastical roles throughout Peru.During the Cuzco Rebellion of 1814, he fervently supported the cause of independence, contributing his resources despite facing adversity when the royal authority was reinstated. His dedication and contributions were acknowledged by the renowned leader Simon Bolívar, who honored him with a civic medal. Sahuaraura Inca continued to play a significant role in Peruvian society, serving as a canon treasurer and later being elected as a deputy.In his later years, he retired to the town of Canas, where he dedicated himself to documenting his family history and writing his memoirs. Notably, he authored "Memories of the Peruvian Monarchy or outline of the history of the Incas," a valuable historical work published in Paris in 1850. His manuscripts, including the codex of the Ollantay drama, held significant cultural and historical significance. The theft of his manuscripts during the Chilean occupation of Lima from 1881–83 led to their eventual return to Peru