The granddaughter of Leonard Kranendonk, for 40 years the baritone voice of Fred Waring’s Pennsylvanians, returned to her gramps’ home state and nearly his hometown of little old Oostburg, up near Sheboygan, der. So did the founder three decades ago in the Big Apple, at the age of 20, of one of the great jazz vocal combos of all time, the Manhattan Transfer, to sing in the ritzy but rustic Sharon Wilson Center for the Arts in this woodsy, wealthy far suburb of Milwaukee. But most of all,