Mike Irwin, better known as Mirwin on Wikipedia, was one of Wikipedia's earliest contributors and administrators, joining the site in 2002 and contributing until 2003. Mike also contributed to Meta-Wiki and Wikiversity until 2008. According to his userpage, he earned his B.S. in Engineering Physics from Oregon State University. By profession, he has been a system analyst, program manager and a control engineer, as well as the sole proprietor of Irwin Consulting. Mike passed away of a heart attack on February 26, 2008.
Jeffrey S. "Jeff" Medkeff, who blogged as the "Blue Collar Scientist," was an astronomer, science educator and writer known for discovering a number of asteroids, which he went on to name after skeptical activists including Phil Plait, Rebecca Watson, and P.Z. Myers. He died on August 3, 2008 at Queen Elizabeth the Queen Mother Hospital of hepatocellular carcinoma, after having "fallen ill" earlier that year.
Pete Fenelon (username Pete Fenelon) made his first edit on December 21, 2005, and contributed more than 1,500 edits to the English Wikipedia over the next three years. He mostly edited on the subject of auto racing, local geography and science fiction. A postgraduate of the University of York in Computer Science, his humorous writings on the nature of programming languages remain, particularly "PPL", the "Paranoid Programming Language", in which nothing is as it should appear to be. According to a message left on the AtlasF1 Bulletin Board, he died in October 2008 at the age of forty. A website and memorial fund have been set up in his memory.
William "Bill" O'Ryan died on February 12, 2008, of complications from rheumatoid arthritis, which had afflicted him for several years. He was born in New York on March 16, 1944, and spent his childhood in the United States, Turkey, and the Netherlands. This multilingual environment led him to proficiency in several languages, including Dutch and Turkish; the US Army trained him in Russian before sending him to Ethiopia, where he taught himself Tigrinya and Ge'ez. As well, while in Ethiopia he met and married his first wife Askalu. Later in life, he and his second wife Fereshteh Taremi taught Esperanto for the Esperanto Society at Arizona State University. An active participant in the Esperanto Wikipedia, Bill amassed over 4,000 edits, spending many hours translating articles into Esperanto and serving as an administrator. He is survived by his siblings Rick and Josephine, his sons Micky, Patrik and Denny, his daughters Zowdi and Jemila, and his grandchildren Joshua, JJ, Izzy, Claudia, Leo, Emmanuel, and Rafael.