He became an Ottoman citizen in 1911 and was apparently adopted (under Turkish law) by the expatriate Baron Heinrich von Sebottendorff shortly thereafter. The adoption was later repeated in Germany and its legal validity has been questioned, but it was endorsed by the Sebottendorff family (Goodrick-Clarke 1985: 140-41) and on this basis he asserted his claim to the Sebottendorff name and to the title of Freiherr.[4]