That which is contrary to law; it is usually applied to bastards, orchildren born out of lawful wedlock.The Louisiana Code divided illegitimate children into two classes: (1) Those bornfrom two persons who, at the moment when such children were conceived, could havelawfully intermarried; and (2) those who are born from persons to whose marriagethere existed at the time some legal impediment. Both classes, however, could beacknowledged and take bv devise. Compton v. Prescott, 12 Rob. (La.) 50.