Alexander I vs Alexander I of Russia

Alexander I and Alexander I of Russia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alexander I	Yes	No	No	No
Alexander I of Russia	Yes	No	No	No

As nouns, Alexander I and Alexander I of Russia are synonyms defined as:

Alexander I and Alexander I of Russia: the czar of Russia whose plans to liberalize the government of Russia were unrealized because of the wars with Napoleon (1777-1825)

Other synonyms of Alexander I include Aleksandr Pavlovich, Czar Alexander I.

Alexander I (noun)	Alexander I of Russia (noun)
the czar of Russia whose plans to liberalize the government of Russia were unrealized because of the wars with Napoleon (1777-1825)	the czar of Russia whose plans to liberalize the government of Russia were unrealized because of the wars with Napoleon (1777-1825)