Louis Thollon was a French astronomer.
He was born in Ambronay, France. Beginning in 1881, Thollon joined the staff of the new Nice Observatory where he undertook a long-term observation program of the Sun using a spectroscope of his own design. Wikipedia
Born: May 2, 1829, Ambronay, France
Died: April 8, 1887 (age 57 years)