Title
Alfon vs. Republic
Case
G.R. No. L-51201
Decision Date
May 29, 1980
A legitimate child, raised under the name Estrella S. Alfon, sought to formalize her lifelong identity. The Supreme Court granted her petition, ruling that Article 364 of the Civil Code allows the use of the mother's surname when justified, avoiding confusion and aligning with her established identity.

Case Summary (G.R. No. 211724)

Procedural Posture and Standard for Relief

The petition for change of name was brought under RA 5440 and Rule 103. Section 5, Rule 103 requires publication of the notice and satisfactory proof in open court that the notice was published and that the petition’s allegations are true; if proper and reasonable cause appears, the court shall adjudge the change of name as prayed. The lower court conducted the required publication, furnished copies to the Solicitor General, and held a hearing where a commissioner was appointed to receive evidence. The appeal to the Supreme Court presents a pure question of law because the facts were not disputed.

Factual Findings Relevant to the Name Change

Uncontested facts established at the hearing: petitioner was born May 15, 1952 and registered and baptized as Maria Estrella Veronica Primitiva Duterte; her biological parents are Filomeno Duterte (father) and Estrella B. Alfon (mother); petitioner was raised by her uncle and aunt, Mr. and Mrs. Hector Alfon, and has resided with them at a specific Mandaluyong address for twenty-three years; from the start of formal schooling through college she has been enrolled and known as Estrella S. Alfon, with school records and a diploma reflecting that name; she has exercised the right of suffrage under the name Estrella S. Alfon; she has no criminal record. Those facts were documented by birth, baptismal, scholastic, voting, and other exhibits.

Lower Court Ruling and Its Limited Grant

The trial court granted the petition insofar as petitioner’s given names were concerned but denied the change of surname. The court concluded that permitting a legitimate child to abandon the father’s surname would contravene Article 364 of the Civil Code, which provides that legitimate and legitimated children shall principally use the surname of the father. Accordingly, the lower court allowed the petitioner to be known as Estrella Alfon Duterte—effectively retaining the paternal surname Duterte while changing given names.

Legal Question Presented on Appeal

The central legal question reviewed by the Supreme Court was whether the lower court erred in denying the petitioner the full change of name to Estrella S. Alfon, in particular whether a legitimate child may lawfully adopt and be judicially authorized to use the mother’s surname when the child has established continuous, long-standing use of that maternal surname such that change is proper and reasonable under Rule 103.

Supreme Court’s Interpretation of Article 364 and Name Change Policy

The Supreme Court accepted the premise that Article 364 provides that legitimate children shall principally use the father’s surname, but it interpreted “principally” as not meaning “exclusively.” The Court held that Article 364 does not legally forbid a legitimate child from choosing to use the mother’s surname. Therefore, the statutory and codal scheme does not operate as an absolute bar to a judicial change of surname where the requisite proof of proper and reasonable cause is shown.

Application of Precedent and Proper Cause Under Rule 103

The Court relied on the criteria identified in Haw Liong v. Republic for what may constitute proper or reasonable causes to grant a change of name, including avoidance of confusion. Applying those criteria to the unco

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