HEIR, LEGAL, civil law. A legal heir is one who is of the same blood of the deceased, and who takes the succession by force of law; this is different from a testamentary or conventional heir, who takes the succession in virtue of the disposition of man. See Civil, Code of Louis. art. 873, 875; Dict. de Jurisp., Heritier legitime. There are three classes of legal heirs, to wit; the children and other lawful descendants; the fathers and mothers and other lawful ascendants; and the collateral kindred. Civ. Code of Lo. art. 883.