>>275631There’s no credible historical evidence that
Karl Marx was transgender.
Marx (1818–1883) was a German philosopher, economist, and political theorist who lived publicly as a man, was married to
Jenny von Westphalen, and had several children. In his extensive letters, biographies, and historical records, there is no indication that he identified as a gender different from the one assigned to him at birth.
If you’re asking because of something you saw online, feel free to share it—I can help look at the claim and where it might have come from.