sentences:  The Duke of Terceira was the head of the "Manoel de Vilhena" family.Heads of the Portuguese branch of that family have been ennobled since the marriage of Constance Manoel with King Pedro I of Portugal.Her brother, Henrique Manoel, was brought into her entourage, and he was made Count of Seia, in Portugal, by his brother-in-law, the king.