blood relation
blood relative
cognate
sib

And many of the men were not close blood relatives.

Having a family history means that a person has one or more blood relatives with a certain health problem.

Hair analysis can be used to check if people are blood relatives.

That was where most of her blood relatives had gone.

I do not have any blood relatives to identify myself with.

This can be particularly so for individuals whose parents or other close blood relatives have died of heart disease at a young age.

His only blood relative was a banker he couldn't stand.

He learned that six people being held there under four family names were blood relatives.

Three women, all blood relatives, share the same name and destiny.

Women whose blood relatives have had breast cancer are at increased risk.