Almost similar to this story:
I once worked in a department where of the six people there were four Thani, and one Thani could not be by definition, since he was a boy. And, what is typical, I (Helena by passport) was also called Tania, because it was not easy to get out and differ from the majority!

The own history:
- Bidaric campaign on the White Sea, 5 men, two ladies (all together one-of-a-kass), two youths and two teenagers. 4 Sasha and Dima. One of the ladies (I...) all the time wanted to call Dimka Sasha (ah, we know each other a couple of dozen years, from the institute).
Two options for his answer:
Pulcheria Ivanovna
Just call me Fede.