Of Illegitimate Children

Of Illegitimate Children — St. Thomas Aquinas asks: Whether children born out of true marriage are illegitimate?; Whether children should suffer any loss through being illegitimate?; Whether an illegitimate son can be legitimized?.

We must now consider children of illegitimate birth. Under this head there are three points of inquiry:

Article 1: Whether children born out of true marriage are illegitimate?

Illegitimate is that which is against the law. Now those who are born out of wedlock are born contrary to the law. Therefore they are illegitimate.

Children are of four conditions. Some are natural and legitimate, for instance those who are born of a true and lawful marriage; some are natural and illegitimate, as those who are born of fornication; some are legitimate and not natural, as adopted children; some are neither legitimate nor natural; such are those born of adultery or incest, for these are born not only against the positive law, but against the express natural law. Hence we must grant that some children are illegitimate.

Article 2: Whether children should suffer any loss through being illegitimate?

It is stated (Gn. 25:5,6) that "Abraham gave all his possessions to Isaac, and that to the children of the concubines he gave gifts": and yet the latter were not born of an unlawful intercourse. Much more, therefore, ought those born of an unlawful intercourse to incur loss by not inheriting their father's property.

A person is said to incur a loss for some cause in two ways: First, because he is deprived of his due, and thus an illegitimate child incurs no loss. Secondly, because something is not due to him, which might have been due otherwise, and thus an illegitimate son incurs a twofold loss. First because he is excluded from legitimate acts such as offices and dignities, which require a certain respectability in those who perform them. Secondly, he incurs a loss by not succeeding to his father's inheritance. Nevertheless natural sons can inherit a sixth only, whereas spurious children cannot inherit any portion, although by natural law their parents are bound to provide for their needs. Hence it is part of a bishop's care to compel both parents to provide for them.

Article 3: Whether an illegitimate son can be legitimized?

What is done by the law can be undone by the law. Now the illegitimacy of children is an effect of positive law. Therefore an illegitimate child can be legitimized by one who has legal authority.

An illegitimate child can be legitimized, not so that he be born of a legitimate intercourse, because this intercourse is a thing of the past and can never be legitimized from the moment that it was once illegitimate. But the child is said to be legitimized, in so far as the losses which an illegitimate child ought to incur are withdrawn by the authority of the law.

There are six ways of becoming legitimate: two according to the canons (Cap. Conquestus; Cap. Tanta), namely when a man marries the woman of whom he has an unlawful child (if it were not a case of adultery), and by special indulgence and dispensation of the lord Pope. The other four ways are according to the laws: (1) If the father offer his natural son to the emperor's court, for by this very fact the son is legitimate on account of the reputation of the court; (2) if the father designate him in his will as his legitimate heir, and the son afterwards offer the will to the emperor; (3) if there be no legitimate son and the son himself offer himself to the emperor; (4) if the father designate him as legitimate in a public document or in a document signed by three witnesses, without calling him natural.