Russian language
The second name is the patronymic (Russian: otchestvo) and comes from one's father's first name. For example, a boy whose father is Ivan would havae as patronymic is Ivanovich. If a boy's father is Nikolai, his patronymic is Nikolaevich. If a girl's father is Ivan, her patronymic is Ivanovna. If her father is Nikolai, her patronymic is Nikolaevna. The patronymic of a boy ends with -ovich or -evich. The patronymic of a girl ends with -ovna or -evna.