No they're not. Hispanic refers specifically to the Spanish settlers of La Plata, Indus, Spanish Main and Meso-american areas, and it's more of a typonomy to differentiate between European Iberian's and the American ones.
Brazilians are by majority ethnically Portugese, so they're not Hispanic even if you want to be anachronistic towards onomastics, and still they're technically Caucasian, as are Iberian's.
Too diverse a people for this to be answered succinctly.
What. No it's not! They're by a large majority still the familia descendants of Portugese families settled in Brazil and the Portugese Jesuits. Most of the indigenous areas are realtively newely Brazilian and still very insular. Slavery ethnographics don't make up that large of a population to shift this either.
No they're not. Hispanic refers specifically to the Spanish settlers of La Plata, Indus, Spanish Main and Meso-american areas, and it's more of a typonomy to differentiate between European Iberian's and the American ones.
Brazilians are by majority ethnically Portugese, so they're not Hispanic even if you want to be anachronistic towards onomastics, and still they're technically Caucasian, as are Iberian's.
Portugese are Iberian (a small minority may be North-African Berber or even smaller actually Bedouin) and Brazil was entirely settled by Iberian Portugese settlers, monopoly companies and Jesuit missions. They either displaced what few natives lived in the areas or forced them further inwards.