'Brother's' in the Bible

Then Yahweh said to Cain, "Where [is] Abel your brother?" And he said, "I do not know; am I my brother's keeper?"

And he said, "What have you done? The voice of your brother's blood is crying out to me from the ground.

You must not expose the nakedness of your brother's wife; she [is] your brother's nakedness.

As for a man who marries his brother's wife, it [is] an abomination; he has exposed his brother's nakedness--they shall be childless.

But if the man [does] not want to take his sister-in-law, then his sister-in-law shall go up to the gate, to the elders, and she shall say, 'My brother-in-law refused {to perpetuate his brother's name} in Israel, [for] he is not willing {to marry me}.'

He said, "You know that the kingship was mine and that all Israel had set their face toward me as king, but the kingship turned around and became my brother's, for it was from Yahweh for him [to have it].

And then [there] was one day when his sons and his daughters were eating and drinking wine in their firstborn brother's house.

At the time this one was speaking, {another} came and said, "Your sons and your daughters were eating and drinking wine in their firstborn brother's house.

But you should not have gloated over your brother's day, on the day of his misfortune, and you should not have rejoiced over the {people} of Judah on the day of their perishing, and you should not have opened your mouth wide on the day of distress.