This is the 7740th most frequent Russian word.
ивана
"Iвана" is a Russian given name, feminine form of "Иван" (Ivan), meaning "Joan" or "Jane."
Here 'Иваном' serves as the instrumental case of 'Иван', used to indicate the person with whom the activity is performed.
Сегодня я встречался с Иваном, и мы обсуждали наш проект.
Today, I met with Ivan, and we discussed our project.
In this sentence, 'Ивана' is the accusative case, used to describe the person receiving the action of being called something.
Ивана в школе называют лучшим учеником.
Ivan is called the best student at school.
Here 'Ивану' is used in the dative case, which is utilized to indicate the recipient of the action (in this case, the letter).