Johann Friedrich Weidler was born in 1691.
It seems that was his real name.
Friedrich Karl Florian was born in 1894.
Carl Friedrich Gauss invented the decaheptagon
Carl Joachim Friedrich died in 1984.
Carl Friedrich Wenzel died in 1793.
Johann Friedrich Weidler died in 1755.
Johann Friedrich Rochlitz was born in 1769.
Johann Friedrich König was born in 1619.
Johann Friedrich Zückert was born in 1737.
Johann Friedrich Schannat was born in 1683.
Johann Friedrich Jaennicke was born in 1831.
Johann Friedrich Flatt was born in 1759.
Johann Friedrich Höger was born in 1877.
Johann Friedrich Reichardt was born in 1752.
Johann Friedrich Schweitzer was born in 1625.
Johann Friedrich Dietler was born in 1804.
Johann Friedrich Doles was born in 1715.