Duke Nikolai Nikolaevich", etc.). From , the monarchs of the Russian Empire claimed the throne as relatives of Grand Duchess Anna Petrovna of Russia (1708–1728), who had married Charles Frederick, Duke of Holstein-Gottorp. Thus they were no longer Romanovs by patrilineage, belonging instead to the Holstein-Gottorp cadet branch of the German House of Oldenburg that reigned in Denmark. The 1944 edition of the Almanach de Gotha records the name of Russia's ruling dynasty from the time of Peter III (reigned 1761–1762) as "Holstein-Gottorp-Romanov". However, the terms "Romanov" and "House of Romanov" often occurred in official references to the Russian imperial family. The coat-of-arms of the Romanov boyars was included in legislation on the imperial dynasty, and in a 1913 jubilee, Russia officially celebrated the "300th Anniversary of the Romanovs' rule". After the February Revolution of March 1917, a special decree of the Provisional Government of Russia granted all members of the imperial family the surname "Romanov". The only exceptions, the morganatic descendants of the Grand Duke Dmitri Pavlovich (1891–1942), took (in exile) the surname Ilyinsky. Origins to 18th century The Romanovs share their origin with two dozen other Russian noble families. Their earliest common ancestor is one Andrei Kobyla, attested around 1347 as a boyar in the service of Semyon I of Moscow. Later generations assigned to Kobyla an illustrious pedigree. An 18th-century genealogy claimed that he was the son of the Old Prussian prince Glanda Kambila, who came to Russia in the second half of the 13th century, fleeing the invading Germans. Indeed, one of the leaders of the Old Prussian rebellion of 1260–1274 against the Teutonic order was named Glande. This legendary version of the Romanov's origin is contested by another version of their descent from a boyar family from Novgorod. His actual origin may have been less spectacular. Not only is Kobyla Russian for "mare", some of his relatives also had as nicknames the terms for horses and other domestic animals, thus suggesting descent from one of the royal equerries. One of Kobyla's sons, Feodor, a member of the boyar Duma of Dmitri Donskoi, was nicknamed Koshka ("cat"). His descendants took the surname Koshkin, then changed it to Zakharin, which family later split into two branches: Zakharin-Yakovlev and Zakharin-Yuriev. During the reign of Ivan the Terrible, the former family became known as Yakovlev (Alexander Herzen among them), whereas grandchildren of changed their name to "Romanov". Feodor Nikitich