All articles starting with J
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John XI Vekkos
John XI Vekkos, also known as John Bekkos (Ιωάννης Βέκκος), was Patriarch of Constantinople from 1275 to 1282 and the leading Byzantine advocate of reunion with Rome.
John XII (Patriarch of Constantinople)
John XII, also known as John XII Kosmas, was Patriarch of Constantinople from 1294 to 1303, raised by Emperor Andronikos II between the two terms of Athanasios I.
John XIII
John XIII was pope from 965 until his death in 972, a Roman noble who owed his election to Otto I and crowned Otto II co-emperor in 967.
John XIII Sweet
John XIII Glykys, a Byzantine scholar and former court minister, was Ecumenical Patriarch of Constantinople from 1315 to 1319, the last patriarch drawn from the court elite.
John XIV
John XIV (Giovanni XIV), born Pietro Canepanova of Pavia, was the 136th pope from 983 to 984, placed on the throne by Emperor Otto II.
John XIV Kaletas
John XIV Kaletas (Ιωάννης ΙΔ΄ Καλέκας) was Ecumenical Patriarch of Constantinople from 1334 until his deposition in 1347, presiding over the trials of Gregory Palamas and the Byzantine civil war that ended his tenure.
John XIX
John XIX, born Romano dei conti di Tuscolo, was the 144th pope, reigning from 1024 to 1032; a layman at election, he crowned Conrad II emperor in 1027.
John XV
John XV was the 137th pope, reigning from 985 to 996, who carried out the first solemn papal canonization, that of Bishop Ulrich of Augsburg in 993.
John XVII
John XVII, born Sicco, was a Roman priest who served as the 140th pope for under six months in 1003, a Crescentii puppet with no surviving acts.
John XVIII
John XVIII, born Fasano, son of a Roman priest, was the 141st pope from 1003 to 1009, known for confirming the see of Bamberg and restoring Merseburg.
John Y. Brown Jr.
John Y. Brown Jr. (1933–2022), Kentucky businessman and 55th governor, bought Kentucky Fried Chicken from Colonel Sanders in 1964 for $2 million with Jack Massey, grew it to 3,500 franchises, sold it for $285 million, and governed 1979–1983.
John Y. Campbell
John Y. Campbell is a Harvard economics professor who co-founded Arrowstreet Capital, a Boston-based quantitative asset manager, in 1999, and is known for the Campbell-Shiller decomposition of stock returns.
John Yates (biochemist)
John R. Yates III is an American scientist at Scripps Research in La Jolla, California, lead inventor of the SEQUEST software and a principal developer of shotgun proteomics.
John Yeager
John Yeager (John David Yeager) is an American materials scientist at Los Alamos National Laboratory who studies the mechanical properties of plastic-bonded explosives and received a 2017 PECASE award.
John Yin
John Yin is a Chinese American chemical engineer and computational virologist known for quantitative models of virus growth, spread, and evolution; he received a 1996 PECASE.
John Yoo
John Choon Yoo, Berkeley Law professor and former Justice Department Office of Legal Counsel deputy (2001–2003), principal author of the 2002 "torture memos" on interrogation and presidential war powers, later reviewed by the OPR and litigated in Padilla v. Yoo.
John Yorke (producer)
John Yorke, British TV producer and drama executive (ex-Controller of BBC Drama Production, Head of Channel 4 Drama, MD of Company Pictures), author of Into the Woods on five-act narrative structure and founder of the BBC Writers' Academy.
John Young (astronaut)
John Watts Young was an American NASA astronaut, the only person to fly in the Gemini, Apollo, and Space Shuttle programs, who walked on the Moon in 1972.
John Yudkin
John Yudkin (1943–2025) was a British physician-scientist in diabetes and metabolism, Emeritus Professor at University College London, who worked on insulin resistance and global insulin access.
John Z. Ayanian
John Z. Ayanian is a physician and health policy researcher who has directed the Institute for Healthcare Policy and Innovation at the University of Michigan since 2012.
John Z. Lee
John Z. Lee, also known as John Zihun Lee, is an American jurist serving on the Seventh Circuit Court of Appeals since 2022, appointed by President Biden.
John Zaborszky
John Zaborszky (1914–2008) was a Hungarian-born American control theorist and power systems researcher who founded and chaired the Department of Systems Science and Mathematics at Washington University in St. Louis.
John Zaccaro
John Zaccaro Jr. is an American Democratic politician and Bronx native serving in the New York State Assembly's 80th district, after more than 14 years in local government service.
John Zachary Young
John Zachary Young, known as J. Z. Young, was a British zoologist and neurophysiologist who rediscovered the squid giant axon and pioneered the octopus for memory research.
John Zaffis
John Zaffis is an American paranormal investigator and author from Stratford, Connecticut, a nephew of Ed and Lorraine Warren and star of Syfy's Haunted Collector.
John Zalcberg
John Raymond Zalcberg AO is an Australian medical oncologist at Alfred Health in Melbourne who co-founded the Australasian Gastrointestinal Trials Group and co-authored a landmark 2008 cetuximab study.
John Zander
John Zander (John Adolf Fredrik Zander, 1890–1967), Swedish middle- and long-distance runner for Mariebergs IK. Olympic silver (1912) and bronze (1920) in the 3000 m team race; world records at 1500 m (3:54.7), 2000 m, and 3000 m; ten Swedish titles; later an actuary in Stockholm. Not the German Paralympic athlete Zander or other Olympians named Zander.
John Zápolya
John Zápolya (Szapolyai János) was voivode of Transylvania and, as John I, king of Hungary from 1526 to 1540, elected after Mohács in opposition to Ferdinand I.
John Zarnecki
John Zarnecki, born 1949, is a British planetary scientist who led the Huygens probe's Surface Science Package, which landed on Saturn's moon Titan in 2005.
John Zaven Ayanian
John Zaven Ayanian is an American physician and health services researcher at the University of Michigan, founding director of its Institute for Healthcare Policy and Innovation since 2012.