'Sister' in the Bible

Now there was a certain man sick, Lazarus of Bethany, of the village of Mary and Martha her sister.

Now Jesus loved Martha, and her sister, and Lazarus.

And having said this, she went away and called her sister Mary secretly, saying, The teacher is come and calls thee.

Jesus says, Take away the stone. Martha, the sister of the dead, says to him, Lord, he stinks already, for he is four days there.

And by the cross of Jesus stood his mother, and the sister of his mother, Mary the wife of Clopas, and Mary of Magdala.