Whose last name should an illegitimate child use?

There are three ways a father may acknowledge his illegitimate child and allow the child to use his last name. Acknowledgment does not mean the child becomes legitimate.

What Are the Rights and Rulings of Illegitimate Children?

Is it haram to have an illegitimate child and name it a non-Muslim name? - Quora

Whose last name should an illegitimate child use?

Illegitimate Child Not Required to Use Surname of Father Even if Acknowledged

Luzon, Visayas, at Mindanao, abot na ng - Citizen Services

Should Illegitimate Children Take The Surname of Their Mom or Dad?

Difference Between Legitimate and Illegitimate Child

Who Are Prince Albert II of Monaco's Kids?

Sayang naman ang leave mo sa trabaho - Citizen Services