This page estimates the number of Lebanese/Syrian/Palestinian/Arab Brazilians is quite a bit lower than that. Most probably have partial ancestry.
https://en.wikipedia.org/wiki/Arab_Brazilians#HistoryThere were many causes for Arabs to leave their homelands in the Ottoman Empire; overpopulation in Lebanon, conscription in Lebanon and Syria, and religious persecution by the Ottoman Turks. Arab immigration to Brazil grew also after World War I and the rest of the 20th century, and concentrated in the states of São Paulo, Mato Grosso do Sul, Minas Gerais, Goiás, and Rio de Janeiro.
