What is the ruling on breastfeeding an orphaned child after weaning one's daughter and completing her two years of nursing, and does he thereby become a son to me and a brother to my children?

If milk is produced after weaning a daughter, and a child under two years of age is nursed with it, that child becomes your son by fosterage and a brother to your children by fosterage. It is stipulated for fosterage that establishes prohibition that there be five full, satisfying sucklings.