To speak about the family members, you need the appropriate vocabulary.
Рис. \(1\). Family
My relatives – мои родственники
Male – мужской
Female – женский
Parent – родитель
Father – отец
Mother – мать
Sibling – родной брат или сестра
Brother – брат
Sister – сестра
Uncle – дядя
Aunt – тетя
Grandparents – бабушка и дедушка
Grandfather – дедушка
Grandmother – бабушка
We will visit our uncle and aunt.
Mike is my brother.
Рис. 1. Family, https://pixabay.com/images/id-2811003/ Pixabay License CC0