tsarevich

/(t)sษ‘หหˆษนษ›vษชtสƒ/
noun
  1. 1

    A son of a tsar, a prince in Russia or Bulgaria

  2. 2

    The firstborn son of a tsar

  3. 3

    The crown prince of Russia or Bulgaria

Source: https://en.wiktionary.org/wiki/tsarevich