'Brethren' in the Bible

‘Thus says the Lord: “You shall not go up nor fight against your brothers (countrymen); return, every man to his house, for this thing is from Me.”’” And they listened to and obeyed the words of the Lord and turned back from going against Jeroboam.

Rehoboam appointed Abijah the son of Maacah the chief leader among his brothers, because he intended to make him king.

Whenever any dispute comes to you from your brothers (relatives) who live in their cities, between blood and blood, between law and commandment, or between statutes and judgments, you are to warn [and instruct] them so that they may not be guilty before the Lord; otherwise [God’s] wrath will come on you and your brothers. Do this and you will not be guilty.

When Jehoram had ascended over the kingdom of his father and made himself secure, he killed all his brothers with the sword [to eliminate any rivals], and some of the leaders of Israel as well.

Then the men who were designated by name rose up and took the captives, and from the spoil they clothed all those who were naked; they clothed them and gave them sandals, and fed them and gave them [something to] drink, anointed them [with oil, as was a host’s duty], and led all the feeble ones on donkeys, and they brought them to Jericho, the City of Palm Trees, to their brothers (fellow descendants of Israel, i.e. Jacob). Then they returned to Samaria.

They gathered their brothers (fellow Levites) together, consecrated themselves, and went in to cleanse the house of the Lord, as the king had commanded by the words of the Lord.

Do not be like your fathers and your brothers, who were unfaithful to the Lord God of their fathers, so that He made them a horror (lifeless, desolate), just as you see.

For if you return to the Lord, your brothers (relatives) and your children will find compassion in the presence of those who led them away captive and will return to this land. For the Lord your God is gracious and merciful, and He will not turn His face away from you if you return to Him.”

Under his authority were Eden, Miniamin, Jeshua, Shemaiah, Amariah, and Shecaniah in the cities of the priests, to distribute faithfully their portions to their brothers (relatives) by divisions, whether great or small,

Slaughter the Passover lambs and consecrate yourselves, and prepare for your fellow countrymen to carry out (obey) the word of the Lord given by Moses.”

The singers, the sons of Asaph, were also in their places in accordance with the command of David, Asaph, Heman, and Jeduthun the king’s seer; and the gatekeepers at each gate did not need to leave their service, because their kinsmen the Levites prepared for them.