Hydatius, also spelled Idacius was a late Western Roman writer and clergyman. The bishop of Aquae Flaviae in the Roman province of Gallaecia, he was the author of a chronicle of his own times that provides us with our best evidence for the history of Hispania in the 5th century.
Henry Harcourt Hyde Clarke was an English engineer, philologist and author.
Hyder Edward Rollins was an American scholar and English professor. He was a prolific author of articles and books on Elizabethan poetry, broadside ballads, and Romantic poets. He was an internationally recognized scholar on John Keats, and he edited the authoritative two-volume edition of Keats' letters.
Hyginus Gromaticus was a Latin writer on land-surveying, who flourished in the reign of Trajan. Fragments of a work on boundaries attributed to him are found in Corpus Agrimensorum Romanorum, a collection of works on land surveying compiled in Late Antiquity. The "surname" Gromaticus ("surveyor") is a false attribution.
Hyman Hurwitz (1770–1844) was a learned Jew who became first professor of Hebrew at University College, London. He was born in Poznań, Poland in 1770, came to England about 1797 and conducted a private academy for Jews at Highgate, where he established a close friendship with Samuel Taylor Coleridge and corresponded with him. Coleridge once described Hurwitz as "the first Hebrew and Rabbinical Scholar in the Kingdom". In 1828, on Coleridge's recommendation, he was elected professor of the Hebrew language and literature at University College, London. His inaugural lecture was published. He died on 18 July 1844. Hurwitz was buried in the Brady Street Cemetery near Whitechapel in London's East End.
Hypatia was a neoplatonist philosopher, astronomer, and mathematician who lived in Alexandria, Egypt, then part of the Eastern Roman Empire. She was a prominent thinker in Alexandria where she taught philosophy and astronomy. Although preceded by Pandrosion, another Alexandrine female mathematician, she is the first female mathematician whose life is reasonably well recorded. Hypatia was renowned in her own lifetime as a great teacher and a wise counselor. She wrote a commentary on Diophantus's thirteen-volume Arithmetica, which may survive in part, having been interpolated into Diophantus's original text, and another commentary on Apollonius of Perga's treatise on conic sections, which has not survived. Many modern scholars also believe that Hypatia may have edited the surviving text of Ptolemy's Almagest, based on the title of her father Theon's commentary on Book III of the Almagest.
Hypatia Bradlaugh Bonner was a British peace activist, author, atheist and freethinker, and the daughter of Charles Bradlaugh.
Hypereides or Hyperides was an Athenian logographer. He was one of the ten Attic orators included in the "Alexandrian canon" compiled by Aristophanes of Byzantium and Aristarchus of Samothrace in the third century BC.
Hyrum W. Smith founded the Franklin Quest Company in 1983. Among the company's other products, Smith created the Franklin Planner and seminars on productivity development based on "principles" and other concepts. In 1997, Franklin Quest merged with Stephen R. Covey's Leadership Center to form Franklin Covey. Smith was the author of 10 Natural Laws of Successful Time and Life Management (1994) and What Matters Most (2001) as well as producing audio tapes.
