In June 2023, a Swiss newspaper published an investigation into the Isdal Woman case proposing a connection to a specific historical figure documented in Swiss federal police surveillance files. The figure had wartime ties to Nazi intelligence, postwar connections to Belgian identity document networks, and documented meetings with Palestinian militant leadership in Paris in late June 1970 — within the window when the Isdal Woman's decoded travel log places her in the same city. Using the Neue Zürcher Zeitung's publicly available June 2023 investigation as your source, identify the surname of the historical figure proposed as a connection to the case.