The Narodnik movement agitated against a ruler with this name who oversaw the Circassian genocide. Another ruler (10[1])with this name allied with Napoleon in the first Treaty of Tilsit (10[1])after a defeat at the Battle of Friedland. (10[1])After that ruler with this name died, (10[1])a group (10[1])of liberal revolutionaries fought for the accession of his brother Konstantin, sparking the Decembrist revolt. (10[1]-5[1])Under a ruler with this name, local assemblies known as zemstvo were created. A reformist tsar with this name ruled Russia (0[1])from 1855 until his 1881 assassination. (10[1])For 10 points, what first name was shared by three 19th-century tsars of Russia, including one who emancipated the serfs in 1861? ■END■ (10[1])