The Narodnik movement agitated against a ruler with this name who oversaw (-5[1])the Circassian genocide. (10[1])Another ruler with this name allied with Napoleon in the first Treaty of Tilsit after a defeat at the Battle of Friedland. (10[3])After that ruler with this name died, a group of liberal revolutionaries fought for the accession of his brother Konstantin, sparking the Decembrist (10[1])revolt. Under a ruler with this name, local assemblies known as zemstvo (-5[1])were created. A reformist tsar with this name ruled Russia from 1855 (-5[1])until his 1881 assassination. For 10 points, what first name was shared by three 19th-century tsars of Russia, including one who emancipated the serfs in (10[1])1861? ■END■ (10[1]0[1])