Bring other children their parents are not allowed by law?

Question
I am 25 years old. My grandfather was adopted, he brought them high so my dad and I are they high. Because they are my original Ocean them, now I have the desire to change his original surname, but my father was much older, do not want to change his name again. So let me ask, if I publish them high, but I wanted to mother them Le Duong changes to them, there are or not?
Answer
According to the data you provide, we now understand that your papers (birth certificate, residence, identity card ...) are bringing them high. According to paragraph 1 of Article 36 of Decree No. 158/2005 / ND-CP of the Government dated 12.27.2005 on the registration and management of civil status "changed name, middle name was registered properly register the birth and the birth certificate, but individual requirements change as legitimate reasons under the provisions of the Civil Code. "
Clause 1 of Article 27 of the Civil Code of 2005 stipulated that "individuals have the right to require state agencies competent to recognize the change of names in cases where" the use of names which cause confusion, emotional impact on the family, honor, rights and legitimate interests of that person. "
Paragraph 2 of Article 37 of Decree No. 158/2005 / ND-CP also stipulates: "2. District People's Committee, but in the realm of the district concerned parties registered before birth, have jurisdiction to settle any change in civil status for the full 14 years of age and determination of race, redefining gender, civil status supplements, adjusted for all civil cases, irrespective of the age "
So, according to the above provisions, in case you notice the surname Cao confuse, influence of family love, honor, rights and legitimate interests of yourself, you can contact the People's Committees district (where he was before birth registration) for guidance, review and settlement.