If the ruler of Russia was called the Czar and his wife the Czarina what were his children?
A male heir was called the tsesarevich or tsarevich and a
daughter was called a tsarevna, in line with standard Russian
naming; -evich and -evna being the proper suffixes for a
patronymic. A typical pun/joke made of the title is that the
children were named tsardines.