Léopold Leau

French mathematician and linguist (1868–1943).

Born April 6th, 1868 in France. [ref]

Died December 28th, 1943 at 75 years old in France. [ref]

Occupations
Esperantist, Idist, linguist, mathematician, university teacher
Wikipedia

To the most trivial actions, attach the devotion and mindfulness of a hundred monks. To matters of life and death, attach a sense of humor. Zhuangzi