blood relative; close family
Refers to immediate family members connected by blood, such as parents, children, and siblings. Often used in emotional or legal contexts.
He is grieving the loss of a close family member.
Precisely because we are blood relatives, I sometimes have to be strict.
He has a famous writer among his blood relatives.
She lost a close family member when she was young.
The love of one's blood family can't be replaced by anything.
He treated me as if I were his own blood relative.