Text of the provision

Art. 366. A natural child acknowledged by both parents shall principally use the surname of the father. If recognized by only one of the parents, a natural child shall employ the surname of the recognizing parent.

Civil Code of the Philippines, Republic Act No. 386, approved June 18, 1949, effective August 30, 1950. Reproduced in full; verified verbatim against the LawPhil and ChanRobles official-text renderings.

What this article means

As originally enacted, a natural child acknowledged by both parents principally used the surname of the father; one recognised by only one parent used that parent’s surname.

How this article reads today. The Family Code no longer uses the category of ‘natural child’: Article 165 provides simply that children conceived and born outside a valid marriage are illegitimate. Surnames are now governed by Article 176 of the Family Code, under which illegitimate children use their mother’s surname — and, under Republic Act No. 9255, may use their father’s surname where its conditions are met.

Related provisions

Cases citing this article

Compiled automatically from Supreme Court decisions published on LawPhil that expressly cite this article, most frequently cited first. A listing means the decision cites the provision — it is not a statement that the case is the leading authority, and it does not show whether a ruling has since been modified or abandoned. Always read the decision itself.

Note. The text of the provision above is reproduced in full from the official enactment (Republic Act No. 386), verified against the LawPhil and ChanRobles renderings. The annotation and commentary around it are the work of Vivas & Nobles Law Office and are general legal information, not legal advice. How a provision applies to a particular situation depends on facts that only a lawyer reviewing your case can assess.