Bankrupt Rudy Giuliani kept his reported girlfriend, Dr. Maria Ryan, and her daughter Vanessa Fenderson on his dwindling payroll, creditors say. However, his security honcho denied Friday that the two are an item, and stressed they’re simply work colleagues. “Dr. Maria Ryan is Mayor Giuliani’s business partner and nothing more,” Ragusa told the New York Post. “Any reports of her being his girlfriend are false rumors made up by the mayor’s enemies to damage his reputation and anyone associated with him.” Fenderson has dabbled as a part-time secretary for Giuliani for more than five years. Want …