People /Mary Duke Biddle Trent Semans peoplepill id: mary-duke-biddle-trent-semansMDBTS 2 views today 12 views this weekAmerican heiress and philanthropistMary Duke Biddle Trent SemansBiographyGallery (2)FAQListsAlso ViewedFrom our partnersSponsoredMary Duke Biddle Trent Semans
