The female can be -ovna or -evna
if father's name ends in consonant (
Anton,
Alexandr,
Oleg), it will be -ovna. (Antonovna, Olegovna)
if the name ends in -y (
Alexey,
Andrey and so on), it will be -evna (Alexeyevna)
And the male patronimic can be -ovich or -evich, the same rules (Antonovich, Alexeyevich)
there are some exceptions anyway