Dmitri Ilyich Ulyanov (Russian: Дми́трий Ильи́ч Улья́нов; 16 August [O.S. 4 August] 1874 – 16 July 1943) was a Russian physician and revolutionary, the younger brother of Aleksandr Ulyanov and Vladimir Lenin.As a medical student at Lomonosov Moscow State University, he became involved with revolutionary activity and joined the illegal Marxist Rabochiy soyuz ("Workers Union"). He was first arrested in 1897. The following year he was exiled to Tula, then Podolsk, where was put under police supervision (equivalent to modern probation). As his brother's renown grew, he endured countless arrests. In 1900 he became a correspondent of Iskra. The following year he graduated from the medical school of the University of Tartu. Wikipedia