azim3330 1) Nicolay is Mikhail's brother , Maxims uncle
2) Mikhail is Maxim's father , Sergey's uncle 
3)Maria is Mikhail's and Nicolay's sister , Maxim's aunt
4) Natalya is Boris's daugther in law, Nicolay's wife 
5) MAxim is Olga's cousin, Maria's nephew
6) Olga is Nicolay's niece , Sergey's's cousin 
7)Victor is Mikhail's nephew , Maxim's cousin.
8) Igor is Nicolay's brother in law , Maria's husband