People United States of America William Thomas Lopp peoplepill id: william-thomas-loppWTL 10 views today 22 views this weekAmerican explorerWilliam Thomas LoppBiographyListsAlso ViewedListsWilliam Thomas Lopp is in following listsBy work and/or countryNotable American ExplorersGender:MaleFrom our partnersSponsoredWilliam Thomas Lopp