Sister

But when the son of Paul’s sister heard about the plot, he went into the barracks and told Paul.

I commend to you our sister Phoebe, a servant of the church in Cenchrea.

Greet Philologus and Julia, Nereus and his sister, and Olympas and all the saints with them.

But if the unbeliever leaves, let him go. The believing brother or sister is not bound in such cases. God has called you to live in peace.

…to Apphia our sister, to Archippus our fellow soldier, and to the church that meets at your house:

Suppose a brother or sister is without clothes and daily food.

The children of your elect sister send you greetings.