Guillaume Henri Dufour (1787-1875) was a Swiss military officer, structural engineer, and topographer known for his significant contributions to Switzerland's military and infrastructure. Born in Konstanz, Dufour's early education in Geneva laid the foundation for his career. After studying at the École Polytechnique in Paris, he joined the French Army and demonstrated exceptional skills in military engineering and cartography. Dufour's leadership during the Sonderbund War in 1847 and other conflicts earned him widespread recognition and accolades. Notably, he played a pivotal role in the establishment of the International Red Cross, presiding over the First Geneva Convention in 1864. Dufour's expertise in topography led to the publication of comprehensive maps of Switzerland, showcasing his dedication to precision and detail. His legacy lives on through his enduring impact on military strategy, infrastructure development, and humanitarian efforts. Dufour's remarkable career exemplifies his unwavering commitment to service and innovation, leaving an indelible mark on Swiss history and beyond.

Guillaume Delisle (1675-1726) was a renowned French cartographer celebrated for his accurate and widely acclaimed maps of Europe and the Americas. Born in Paris to Claude Delisle and Marie Malaine, he demonstrated exceptional talent from a young age, contributing to his father's workshop and later becoming a student of astronomer Jean-Dominique Cassini. Admitted to the French Académie Royale des Sciences at 27, Delisle signed his maps as "Géographe de l’Académie" and established a successful publishing business in Paris. His exceptional skill and dedication led to him being appointed as Premier Géographe du Roi, teaching geography to the Dauphin and leaving a lasting legacy in the field of cartography. Despite not traveling with explorers, Delisle's meticulous approach and access to recent accounts from travelers and members of the Académie allowed him to produce high-quality, up-to-date maps. His pursuit of accuracy led to a legal dispute with fellow cartographer Jean-Baptiste Nolin, which ultimately affirmed Delisle's commitment to presenting current knowledge. Following his death, his family sought to preserve his workshop and protect the family's legacy. Guillaume Delisle's contributions to cartography continue to be celebrated for their precision and enduring value.

Guillaume Dubois (1656–1723) was a French cardinal and statesman known for his influential role in French politics during the early 18th century. Born in Brive-la-Gaillarde, he received education at the school of the Brothers of the Christian Doctrine and later obtained a scholarship at the college of St. Michel in Paris. Dubois gained favor with Louis XIV through his efforts in arranging the marriage of his pupil to Françoise-Marie de Bourbon. He became a prominent figure in the French government and played a key role in maintaining the peace of Utrecht, opposing the schemes of Cardinal Alberoni, and negotiating alliances with other European powers. Dubois' political prowess and influence led to his appointment as the first minister of France and his elevation to the position of Cardinal. Despite accumulating immense wealth and achieving significant political prominence, his health deteriorated due to his extravagant lifestyle, ultimately leading to his death in 1723. Dubois' complex character and controversial actions were scrutinized by his contemporaries and remain subjects of historical interest.

Guillaume Couture (January 14, 1618 – April 4, 1701) was a remarkable figure in New France, known for his diverse roles and experiences. Born in Rouen, Normandy, Couture was recruited by the Jesuits in 1640 to work as a lay missionary in New France, where he played a pivotal role in converting Natives to Roman Catholicism. He honed his linguistic skills and cultural understanding, becoming an invaluable translator and diplomat. Couture's resilience was evident when he faced harrowing experiences, including surviving torture by the Iroquois, displaying unwavering courage and gaining the respect of his captors.Notably, Couture's bravery and skills led to him being invited to sit on Iroquois councils, a rare honor for a European. His diplomatic talents were further showcased when he played a crucial role in negotiating a peace settlement between the Five Nations Iroquois and the French, contributing to the end of war. After enduring such trials, Couture continued his impactful work, including his involvement in the Huron missions and serving as the first settler of the Seigneury of Lauzon at Pointe-Lévy.Couture's legacy extends beyond his missionary and diplomatic endeavors. He married Anne Émard and had ten children, embracing a family life alongside his significant contributions to New France. Additionally, his role as a diplomat took him to New Netherland (present-day New York)

Guillaume Durand, also known as William Durand, was a prominent French canonist, liturgical writer, and Bishop of Mende, born around 1230 in Puimisson, near Béziers. He studied law at Bologna and became a successful canon law teacher at Modena by 1264. Durand's career was marked by his service to several Popes, including Clement IV and Gregory X, and his significant contributions to the Second Council of Lyons. As Bishop of Mende, he focused on ecclesiastical reform and pacifying the territories he previously governed. Durand is renowned for his principal work, the "Speculum iudiciale," a comprehensive explanation of civil, criminal, and canonical procedures, and his liturgical treatise "Rationale divinorum officiorum," which provided insights into the Christian ritual's origin and symbolic sense. His practical sense, methodical approach, and clarity in synthesizing Roman and ecclesiastical law earned him the nickname "Doctor Speculator." Durand's contributions to canon law and medieval Latin liturgy continue to be highly regarded. He passed away in Rome on November 1, 1296, leaving a lasting legacy in the fields of law and liturgy.