blood relation

American  

Or blood relative

noun

1. one related by birth.

---

blood relation British  

noun

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

---

Etymology

Origin of blood relation

First recorded in 1700–10

Example Sentences

James Blaesing told an Ohio court that he is seeking Harding’s disinterment as a way “to establish with scientific certainty” that he is the 29th president’s blood relation.

From Seattle Times • Sep. 13, 2020

Or perhaps her husband who is the one who desperately desires a blood relation.

From Slate • Jul. 29, 2020

After Thomas’s death’s death last year, the protracted fight continued between Ms. Kaffaga and Gail, who have no blood relation to the author, a point that came up during the recent trial.

From New York Times • Sep. 7, 2017

The actress was not one of the famed director’s three children, and in fact had no blood relation to him.

From Los Angeles Times • Jul. 20, 2016

So I did not ask why I was raised in a house by many men, none of w hom claimed blood relation to me.

From "The Astonishing Life of Octavian Nothing, Traitor to the Nation, Volume I: The Pox Party" by M.T. Anderson