Haddad was born in São Paulo, the second of three children of salesman Khalil Haddad, a Lebanese Maronite immigrant that arrived in Brazil in 1948 from Ain Aata, and Norma Teresa Gousain, the daughter of immigrants from Lebanon.
Haddad lahir di São Paulo, anak kedua dari pengusaha Khalil Haddad, seorang imigran Maronit Lebanon yang tiba di Brasil pada tahun 1948 dari Ain Aata, dan Norma Teresa Gousain, seorang putri imigran dari Lebanon.