'Relatives' in the Bible

Adonijah sacrificed sheep, oxen, and fatted cattle by the Serpent Stone near En-rogel, inviting all of his relatives, the king's sons, and all of the men of Judah who worked for the king,

‘Thus says the Lord, “You must not go up and fight against your relatives the sons of Israel; return every man to his house, for this thing has come from Me.”’” So they listened to the word of the Lord, and returned and went their way according to the word of the Lord.

As soon as he had consolidated his reign, he executed the entire household of Baasha. He did not leave a single male alive, including any of Baasha's relatives or friends.