Ernest Radlov

{{Short description|Russian philosopher and historian (1854–1928)}}

{{family name hatnote|Leopoldovich|Radlov|lang=Eastern Slavic}}

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Ernest Leopoldovich Radlov or Ernst Radlow ({{langx|ru|Эрнест Леопольдович Радлов}}, 1854–1928) was a Russian neo-Kantian philosopher and historian of philosophy of German origin. Co-founder of the St. Petersburg Philosophical Society, director of the Public Library in Petrograd (1918–1924).

He was also a friend and editor of Vladimir Solovyov.

Radlov introduced Thomas Masaryk to Russian philosophy in conversations over the summer of 1882.{{cite book|author=Josef Novák|title=On Masaryk: Texts in English and German|url=https://books.google.com/books?id=fQouAI8An0sC&pg=PA224|year=1988|publisher=Rodopi|isbn=90-6203-979-0|page=224}}