surname of the father, and the middle name (maternal surname) of the mother as surname. But the surname becomes of the father's surname upon legal and administrative acknowledgment by his/her father. The child of a single father takes no middle name, even when the mother's identity is known. To illustrate that, the daughter of an unmarried couple named Ana Cristina dela Cruz Manansala and Jose Maria Panganiban Lozada, named '"Maria Cristina'", will be named Maria Cristina Manansala dela Cruz (or Ma. Cristina M. dela Cruz), with Ana Cristina's middle name, dela Cruz, as surname. But once Jose Maria wants to acknowledge her as his child legally and administratively, Maria Cristina will take the surname Lozada, but keep the maternal surname Manansala as middle name, thus, Maria Cristina Manansala Lozada (or Ma. Cristina M. Lozada). As the daughter of only Jose Maria, Maria Cristina will be rather called Maria Cristina Lozada or Ma. Cristina Lozada, even when the mother is known. In married women, the middle name usually corresponds to the original/birth surname, but on professional society, women usually add the husband's surname after their original/birth name, keeping the maternal surname. A married woman may decline taking the husband's surname and keep her original/birth name as no Philippine law compels women to take her husband's surname. Thus, a woman named Maria Concepcion Perez Limchauco (or Ma. Concepcion P. Limchauco), once marrying Juan Pablo Sanchez Marasigan (or Juan Pablo S. Marasigan) may take the name Maria Concepcion Perez Limchauco-Marasigan (or Ma. Concepcion P. Limchauco-Marasigan), maintaining the maternal surname Perez, Maria Concepcion Limchauco Marasigan (or Ma. Concepcion L. Marasigan), taking the original/birth surname Limchauco as middle name and Marasigan as married surname, or keep her original/birth names, remaining Maria Concepcion Perez Limchauco. See also Bilingual tautological names Double name Dual naming Name blending List of double placenames References Surname