Adam Clarke on Proverbs 23:11

For their redeemer is mighty - גאלם goalam, their kinsman. The word means the person who has a right, being next in blood, to redeem a field or estate, alienated from the family, to avenge the blood of a murdered relative, by slaying the murderer; and to take to wife a brother's widow, who had died childless, in order to preserve the family. The strength here mentioned refers to the justness of his claim, the extent of his influence, and the powerful abettors of such a cause. But in reference to the orphans here mentioned, they having no kinsman, God takes up, vindicates, and avenges their cause.