Claude Auguste Lamy
Claude Auguste Lamy was a French chemist who discovered the element thallium independently from William Crookes in 1862.
Lamy was born in the commune of Ney in the department of Jura, France in 1820. He studied at the cole Normale Suprieure, Paris. After he graduated from University in 1842 he became a teacher at Lille then at Limoges and again in Lille. In 1851 he received his Ph.D. In 1854 he became professor at the faculty of sciences of Lille and taught at cole centrale de Lille. In 1866 he changed to the cole centrale de Paris. Lamy died in 1878.
Source: Wikipedia