Cristiano Ronaldo was born in Portugal, to his mother Maria Dolores dos Santos Aveiro and his father José Dinis Aveiro. He grew up with a elder brother Hugo, and two elder sisters, Elma and Katia. Katia works as a singer by the stage name "Ronalda" in Portugal.

His second name ("Ronaldo") is relatively rare in Portugal. His parents named him after former US president Ronald Reagan because he was his father's favourite actor, and not for political reasons.