Several chapters in my book revolve around a widowed Russian countess, age 76, who teaches piano to a 16-year old Russian girl. Let's say the teacher's name is Anna Akhmatova Gorenko, and the girl is named Marina Ivanovna Petrov. How would the girl address her teacher since there is no equivalent to "Mrs" in Russian? Would the girl use all three names, 'Anna Akhmatova Gorenko', only the first and second, or, since she is a minor addressing an elderly person, possible 'Madame' Gorenko?
Similarly, what options are available to the narrator when using the teacher's name in a speaker tag? 'Madame Gorenko' would certainly be preferable over the frequent and cumbersome use of both the given and patrynomic names. Is there another option?
(I have not read Tolstoy's Anna Karenina, but in leafing through some pages, I noticed that Stepan Arkadyevitch Oblonsky is often simply tagged as Oblonsky. And 'Count Alexis Kirillovich Vronsky' is frequently just 'Vronsky')