I'm very much sure that your father is, this time, wrong. Camara is the name that the descendents of João Gonçalves Zarco, who discoverd the MADEIRA island,took. Camara as short for Camara de Lobos. This in the old days mean that they were the lords of Camara de Lobos.
You can see exactly this by looking into the Camara family tree. Try "Camara" or "da Camara" or Zarco at www.ancestry.com
Therefore your family name has a much glorious past (see the family tree) than what you could imagine.
João António da Costa Maya