She is normally referred as Eva (or her legacy name of Scooter by some of us) but when I hear Leora call her name as she does 100s of times a day she seems to be saying
"Yevan".
Obviously the "Ye" being Russian is expected but is the 'n' she adds part of how she speaks or is some kind of imperative form of "Yeva". It has been a long time since I passed my Russian 'O' Level so I have vague ideas that there might be such a form but I doubt very much it ends in 'n'.