What do you call a Russian father?

There's no single, specific term for a Russian father. You would simply use the Russian word for "father," which is отец (pronounced "ot-ets").

You could also use terms like:

* папа (papa) - a more informal and familiar term for father

* родитель (roditel') - a more general term for parent

* батя (batya) - a slang term for father, often used by young people or in a humorous context

It's important to note that the appropriate term depends on the context and the speaker's relationship with the father.