'Brothers' in the Bible

All these with one mind and one purpose were continually devoting themselves to prayer, [waiting together] along with the women, and Mary the mother of Jesus, and with His brothers.

And on the second visit Joseph identified himself to his brothers, and Joseph’s family and background were revealed to Pharaoh.

At the end of three months we set sail on a ship which had wintered at the island, an Alexandrian ship with the Twin Brothers [Castor and Pollux] as its figurehead.