'Brethren' in the Bible

And Abner called to Joab, and said, Shall the sword devour for ever? knowest thou not that it will be bitterness in the latter end? and how long shall it be ere thou bid the people return from following their brethren?

Then was Abner very wroth for the words of Ishbosheth, and said, Am I a dog's head, I who against Judah do shew kindness this day to the house of Saul thy father, to his brethren, and to his friends, and have not delivered thee into the hand of David, that thou reproachest me this day with the fault of this woman?

Thou didst come yesterday, and should I this day make thee go up and down with us, seeing I go whither I can? Return and take back thy brethren. Mercy and truth be with thee!

Ye are my brethren, ye are my bone and my flesh; and why will ye be the last to bring back the king?

And behold, all the men of Israel came to the king, and said to the king, Why have our brethren the men of Judah stolen thee away, and have brought the king, and his household, and all David's men with him, over the Jordan?