No Egito antigo era permitido o casamento entre os familiares para proteger a pureza do sangue da família do faraó. Palavras-chaves: Direito de Família. Código Civil. Family law has undergone several changes until it reaches its present plurality and this work will present all existing family arrangements in our society, since the family is one of the oldest institutes known, Traditional family. Before reaching the denomination family as it is today, individuals formed groups for survival. In ancient Egypt marriage was allowed among the family to protect the purity of the blood of Pharaoh's family. In Brazil relations are monogamous and marriage between people of the same family is not allowed. Our current legislation only protects marriage, one-parent family and stable union, and this last is a great advance taking into account the time that the draft Civil Code of was written. Today, what gives form to relationships is affectivity, which forms a bond as strong as blood.