The various designations Tsar' Kazanskii etc including Velikii Knyaz' Smolenskii and Naslednik of Norway; form part of a long string of historic appellations that formed H.I.M.'s full title.
Rather than expressing the full title, in documents and such like, for the sake of simplicity, the last Head of State of Imperial Russia was:
Bozhiyu Milostiyu Mi Nikolai II,
Imperator i Samoderjhets Vserossiyskii,
Tsar' Pol'skii, Velikii Knyaz' Finlyandskii
i prochaya, i prochaya, i prochaya.
By God's Grace We Nikolai II,
Emperor and Autocrat of All the Russias,
Tsar of Poland, Grand Duke of Finland,
and so on, and so on, and so on.