Eugen Rosenstock-Huessy was a historian and social philosopher, whose work spanned the disciplines of history, theology, sociology, linguistics and beyond. Born in Berlin, Germany into a non-observant Jewish family, the son of a prosperous banker, he converted to Christianity in his late teens, and thereafter the interpretation and reinterpretation of Christianity was a consistent theme in his writings. He met and married Margrit Hüssy in 1914. In 1925, the couple legally combined their names. They had a son, Hans, in 1921.

Eugen Roth was a Bavarian poet who wrote mostly humorous verse.

Eugen Rozvan was a Hungarian-born Romanian communist activist, lawyer, and Marxist historian, who settled in the Soviet Union late in his life and was executed during the Great Purge.

Eugen Ruge is a German writer, director and translator from Russia. In 2011 he won the German Book Prize for In Times of Fading Light.

Eugen Simion was a Romanian literary critic and historian, editor, essayist and academic.

Evgeny "Eugen" Evgenievich Slutsky was a Russian and Soviet mathematical statistician, economist and political economist.

Eugen V. Witkowsky was a Russian fiction and fantasy writer, literary scholar, poet, and translator.

Eugen Joseph Weber was a Romanian-born American historian with a special focus on Western civilization.

Eugen Wolf was a German journalist and traveller.

Eugene Borisovich Alexandrov is a Russian physicist, member of the Russian Academy of Sciences, Doctor of Sciences, head of the Commission on Pseudoscience.