Nikolai is Mikhail's brother, and also Olga's and Maxim's uncle.
Mikhail is Maxim's father, and Olga's, Victor's and Sergei's uncle.
Maria is Nikolai's and Mikhail's sister, and Maxim's, Victor's and Sergei's aunt.
Natalya is Boris' daughter-in-law, and Nikolai's wife.
Maxim is Olga's, Victor's and Sergei's cousin.
Olga is Nikolai's and Mikhail's niece, then Maxim's Victor's and Sergei's cousin.
Последние два вопрос на фотографии сняты не полностью.