You can help expand this article with text translated from the corresponding article in Finnish. (March 2024) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Finnish Wikipedia article at [[:fi:Yrjö Sakari Yrjö-Koskinen]]; see its history for attribution. You may also add the template {{Translated|fi|Yrjö Sakari Yrjö-Koskinen}} to the talk page. For more guidance, see Wikipedia:Translation.

Baron Yrjö Sakari Yrjö-Koskinen (birth name Georg Zakarias Forsman, author name Yrjö Koskinen; 10 December 1830 in Vaasa – 13 November 1903 in Helsinki) was a friherre, senator, professor, historian, politician and the chairman of the Finnish Party after Johan Vilhelm Snellman. He was a central figure in the fennoman movement. His original name was Georg Zakarias Forsman and his family from his father's side originated from Sweden. He later fennicized his name to Yrjö Sakari Yrjö-Koskinen. He was the husband of Finland's first female author, Theodolinda Hahnsson.

He is buried in the Hietaniemi Cemetery in Helsinki.^[1]

• Works by Yrjö Sakari Yrjö-Koskinen at Project Gutenberg
• Works by or about Yrjö Sakari Yrjö-Koskinen at the Internet Archive
• Yrjö Koskinen in 375 humanists 28.1.2015, Faculty of Arts, University of Helsinki

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