These come from a souvenir book issued after the Olympics. The two pages are facsimile signatures of the individual gold medalists from the 1936 Olympics. The top one is Gerhard Stöck, gold medal in javelin. The two Arabic signatures are probably Khadr El-Touni and Anwar Mousbah, Egyptian weightlifters. The one on the right is Georges Miez, Swiss Gymnast. I believe there may be a third Arabic signature in there which would be Yasar Erkan, Turkish wrestler.
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Karl Hein signed at the 1938 European Championships
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George Miez signed in the 1990's
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Naoto Tajima signed at the 1936 Olympics
I also have a Josef Manger signed around that time, but it is not scanned.