blood relation

one related by birth.

Origin of blood relation

First recorded in 1700–10

It was the Wahpeton chief who spoke, a blood-relation to Tawasuota.

Old Indian Days |[AKA Ohiyesa], Charles A. Eastman
Wo, therefore, to him who has slain the Corsican's brother or blood-relation!

Wanderings in Corsica, Vol. 1 of 2 |Ferdinand Gregorovius
I have not looked upon any member of that family who has come to me, in any other light than as a blood-relation.

The Bbur-nma in English |Babur, Emperor of Hindustan
Edom was the most bitter enemy of Israel, their blood-relation.

The Prophet Ezekiel |Arno C. Gaebelein

The young man was no blood-relation to him, and naturally supposed that such relations would become the heirs.

The Parisians, Complete |Edward Bulwer-Lytton

blood relation

a person related to another by birth, as distinct from one related by marriage

blood relation

A person who is related to another by birth rather than by marriage.