FAQ on Civil Registration Procedures: Births

Who are legitimate children?
Children born after one hundred and eighty days following the celebration of the marriage, and before three hundred days following its dissolution or the separation of the spouses shall be presumed to be legitimate. (Art. 225, Civil of the Philippines).
Children conceived or born during the marriage of the parents are legitimate.
Children conceived as a result of artificial insemination of the wife with the sperm of the husband or that of a donor are likewise legitimate children of the husband and his wife, provided that both of them authorized or ratified such insemination in a written instrument executed and signed by them before the birth of the child. The instrument shall be recorded in the civil registry together with the birth certificate of the child. (Art. 164, Family Code of the Philippines).
Is the child considered legitimate although the mother may have declared against its legitimacy?
The child shall be considered legitimate although the mother may have declared against its legitimacy or may have been sentenced as an adulteress. (Art. 167, Family Code of the Philippines)
What are the rights of legitimate children?
Legitimate children shall have the right :
  1. To bear the surnames of the father and the mother:
  2. To receive support from them, from their ascendants, and in a proper case, from their brothers and sisters, in conformity with article 291 and,
  3. To the legitimate and other successional rights which this Code recognize in their favor. (Art. 263, Civil Code of the Philippines)
Does the practice of some Filipino Muslim of using the first name of the father as the family name of the children violate the pro