Bruce Guimaraens, one of the Port industry's most prominent personalities, has died at the age of 66 from a heart attack on 22 August 2002.   Bruce Duncan Guimaraens was born in October 1935, the great-great grandson of Manuel Pedro Guimaraens, who founded the house of Fonseca Guimaraens in 1822.   Son of Cathleen May and Charles Bruce Fonseca Guimaraens, he began life a stone's throw from his family's Port lodges in Vila Nova de Gaia.