Alfredo Luís da Costa was a Portuguese publicist, editor, journalist, shop assistant and salesman who was part of the Portuguese Carbonária and a Mason, best remembered for being one of the two assassins credited in the assassination of King Carlos I of Portugal and the Prince Royal, Luis Filipe, during the events that became known as the 1908 Lisbon Regicide, ultimately leading to his death.

Manuel dos Reis da Silva Buíça was a Portuguese schoolteacher and soldier involved in the regicide of King Carlos I of Portugal and Prince Royal, Luís Filipe, during the events that became known as the Lisbon Regicide.