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Colin Hall, a retired engineer and project manager from England, was an administrator who wrote many articles on technical subjects, especially thehistory of technology. He also helped out at forums for newcomers, particularly thescience reference desk and thehelp desk. He began editing in 2007, and in 2009 he celebrated the completion of his firstfeatured article, a biography of the American telephone engineerOtto Julius Zobel. Spinningspark brought seven additional topics to featured status, and shepherded sixty-four more through thegood article process. He made his last edit on 16 February 2023, the day before hissudden and unexpected passing.

Jo Pugh was a British Wikimedian for nigh on two decades. As an employee ofthe United Kingdom's National Archives, he led or spoke at severalWikipedia:GLAM-wiki events, as well as being a contributor to Wikipedia,Wikisource,Wikidata andWikimedia Commons, both professionally and on his own time. He died on 22 February 2023, several years after first being diagnosed with cancer.

David Goodman, a science librarian who began editing Wikipedia in 2006, was known for being helpful and willing to deal with a variety of complex problems, including conflict of interest and promotional editing. He was on Wikipedia'sArbitration Committee from2015 to 2018 and then in 2020. He was also involved inWikimedia New York City. He died aged 79 on6 April 2023.

Thomas Hibbs was an enthusiastic Wikimedian since 2006. His love of knowledge was so great he returned to school for a library sciences degree. He had particular interest in preserving information on Vermont (his long time home), Hungary (where his family hailed from), vinyl records, books, and retro video games. Thibbs was an experienced and regular contributor who devoted his time to English Wikipedia and Wikimedia Commons. He created 118 articles on many topics including a detail history of Hungarian animation, and a now lengthy article on the subject of nonviolent video games. He died on 14 April 2023, several years after being diagnosed with brain cancer, at the age of 41.

Deror Lin, a lawyer and Israeli Wikimedian since 2004, was one of the most prominent members of the Israeli community and theHebrew Wikipedia. He wrote over 8,750 Wikipedia articles in Hebrew and over 70 in English, and uploaded thousands of images to Wikimedia Commons. He served as a board member of Israel'slocal Wikimedia chapter, which he helped found in the late 2000s. Deror was part of the core team that organizedWikimania 2011, as well as the globalWiki Loves Monuments competition in 2014. He is among the most prolific100 WikiDays competitors, having completed the challenge at least 14 times. He is also aWikimedia Laureate. Deror passed away on May 6, 2023.

Inoslav Bešker was a Croatian journalist and academic who worked as a correspondent in Rome for various media outlets. He earned a PhD in ComparativeSlavic studies at theUniversity of Milan, and had taught at theUniversity of Split,University of Naples "L'Orientale",Sapienza University of Rome, as well as the universities ofBologna, theZagreb andDubrovnik. He left 2,194 edits on Wikimedia projects. Bešker passed away on June 29, 2023.

John Clark, an English actor, director, and producer, edited Wikipedia from 2006 to 2022, making the last of his 3,224 edits at the age of 90.He died on July 6, 2023, at 91.

Donald Peter Cram was an American Wikipedian who created over 13,500 main-space articles, and many more pages in total. Many of these focused on U.S. National Historic Register entries and U.S. National Historic Landmarks. He also worked on articles aboutNRHP-affiliated artists, architects, builders, and engineers. He participated in severalWikiProjects over the years, was active atAfD, and created many excellent list articles. During his lifetime he worked as acabbie in New York City, where he also worked as a budget analyst. He held faculty positions atMIT,Cal State Fullerton in California and at theState University of New York at Oswego. Later, after moving toMontrose, Colorado, he was employed in airport operations. He died on July 9, 2023 in Montrose of natural causes. His obituaries include:Montrose Press andSyracuse Post Standard.

Ingo Koll was a German who spent many years as a pastor and lecturer in Kenya and Tanzania. He was a longstanding and very active editor, bureaucrat and administrator on the Swahili Wikipedia. He was the original member and founder ofJenga Wikipedia ya KiswahiliAffiliate in Tanzania, and created extensive editing education and training programs inKiswahili. He had over 1,800 edits to English and German Wikipedias, as well as many edits to Wikidata and Commons, but the project he considered "home" was the Swahili Wikipedia, where he had over 52,000 edits. He passed away on July 10, 2023.

Dr. Peter McCawley, an economist from theAustralian National University, spent a little over ten years on Wikipedia contributing in his area of expertise: the economy and politics of Indonesia. Outside of Wikipedia, hiscareer history included being the executive director ofAsian Development Bank, dean of theAsian Development Bank Institute, and the deputy director general ofAusAID; his work was indeedcited on Wikipedia itself. Hedied on July 18. His obituarycan be found here.

Eagleash, fromSouth Croydon, London, began editing Wikipedia on 15 October 2012 and amassed nearly 109,000 edits on many subjects including his belovedCrystal Palace F.C. andFormula One. He often helped out new users at thehelp desk and inarticles for creation. He edited every day for over eight years from 9 April 2015 until his last edit on 29 May 2023, achievingthe fourth-longest such editing streak inall namespaces along withthe same ranking (among non-bot editors) in thearticle namespace list. He died on 8 June 2023, aged 70, after a heart attack.

Theodor Otto Diener was a Swiss plant pathologist who was the first to recognize and nameviroids, the smallest known infectious agent. He was awarded theNational Medal of Science by the President of the United Statesin 1987; among many other honors. Diener died at his home inBeltsville, Maryland, on 28 March 2023, at the age of 102. At the age of 96, he made 16 mainspace edits, mostly to improvingviroid, and corrections to his own biography article, with oversight by an experienced editor,User:Graham Beards. He also made 78 mainspace edits using an earlier account,User:Dienerto. TheWashington Post obituary (Archive) has more information.

Richard Haslam was a British Wikimedian and administrator. He registered in 2012, and after a few years of dormancy, began editing in 2018. Acquiring adminship the next year, he began using the tools extensively, helping out where he could in areas that ranged fromArticles for Creation tosockpuppet investigations. In recent years, his focus shifted to working behind the scenes to collaborate with the Wikimedia Foundation and other volunteers across the movement on governance initiatives, including theUniversal Code of Conduct andMovement Charter. Through this work he always remained grounded as a proud member of the online communities, especially English Wikipedia; bringing a persistent but pragmatic accountability to the broader Wikimedia landscape, that will make his loss all the more felt. At the time of his passing, he was serving as an elected community member on the Movement Charter Drafting Committee, helping to create new structures and policy to help lead Wikimedia into the next decade.

Wolf Dieter Haupt was born on 11 April 1943 inInnsbruck, Austria. He studiedtelecommunications engineering atTU Wien, then began working as a programmer for many years inassembly language. Programming remained a constant preoccupation throughout his life, and in his many jobs in Austria, Switzerland and Germany he supported and encouraged young programmers. From 1980 he lived inStuttgart and from 2010 inBad Friedrichshall, Germany, where he built aTiny House in a large garden, almost entirely by himself.

Dieter was interested in everything and was always curious about new things: people, languages, foreign countries, literature, nature, science and art. In Vienna, he took part in the events staged by theViennese Actionism movement. He loved cycling and nature.

On Wikimedia Commons he was committed to the creation, maintenance and further improvement of templates, especially in the field ofheraldry or the widely usedOne-letter templates, likeTemplate:C orTemplate:F. So everytime we are using{{C|category name}} or{{F|file name}} he still lives on. Always friendly, level-headed, and deeply knowledgeable, he was unfailingly helpful. Dieter died on 20 September 2023 from a very rapidly progressing cancer.

Please feel free to sign thelist of condolences.

Dr.Steven B. Harris was born in Springville, Utah, USA, in 1957.

He obtained an undergraduate degree in chemistry from Brigham Young University, and a medical degree from the University of Utah and Brigham Young University. Dr. Harris did a fellowship in gerontology and geriatric medicine at the UCLA School of Medicine, and was a biogerontology Research Fellow at UCLA until 1993. Board-certified in internal medicine, he practiced and taught geriatric medicine at the University of Utah Medical School. He made more than 38,000 contributions to Wikipedia, with a particular interest in the history of the AmericanOld West.

He wascryonically preserved by theAlcor Life Extension Foundation in November 2023.

Tribute written by Brian Wowk

Mary Hamlen was from Boston, Massachusetts. She worked to address gender equality on Wikimedia Projects. In addition to adding content since 2018 to Wikipedia (6,000 edits) and Wikidata (4,000 edits), Hamlen mentored new editors. She led regular in-person editing sessions with theWikiProject Women in Religion. She contributed to the bookWomen Advancing Knowledge Equity: The Parliament of the World’s Religions, third in a series called "Women in Religion". In that book, she wrote the biographies ofYvonne V. Delk andIsabel Apawo Phiri. Hamlen was a certified mediator, and worked as program staff with theProgram on Negotiation at Harvard Law School. She held a Masters of Advanced Studies inEcumenical Studies from theUniversity of Geneva, and a Master of Divinity from thePacific School of Religion.

Tribute published at theCarleton College website, Polly's alma mater.

Mikhail Lewis, known by the Wikipedia username Hyacinth, began editing in 2003 and became an administratorin 2004. He amassed nearly 177,000 edits on the site, many of which related to music, and created theList of music students by teacher system. Of particular note, he was often the first to both create and maintain articles on music theory topics; his efforts included a variety of templates and diagrams to illustrate these complex topics. Hyacinth passed away onDecember 9, 2023 at the age of 42 due to epilepsy.

Pvmoutside was an editor who from their earliest edits in 2006 primarily edited about birds, and to a lesser extent about other animals and American politics, racking up nearly 275,000 edits over their 17 years of editing. They died on 30 August, 2023 at the age of 62, 1 day after their last edit, but their death was not recognised on Wikipedia until 2025.