AMSTERDAM (AP).- If portraits could talk, Jan Six might have much to say about his family. The merchant, poet and civic leader, painted by Rembrandt in 1654, has watched his descendants make money, marry into Holland’s best families, engage in infidelities and sometimes quarrel over their fabulous inheritance. For most of the past 350 years, he has hardly moved. Rarely has he left the family home. When the ancestral canal-side building was torn down in 1915 to broaden a road, he moved around the corner, where he is perched on the wall next to a tall window overlooking the Amstel River. Now one of Rembrandt’s most celebrated paintings is on public display until Nov. 29 at Amsterdam’s Rijksmuseum while the 58-room Six mansion undergoes renovations. Throughout the ages in which