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 Friedrich Wenzel died in 1793.
Carl Joachim Friedrich died in 1984.
Johann Friedrich Weidler died in 1755.
Johann Friedrich Weitsch was born in 1723.
Johann Friedrich Dryander was born in 1756.
Johann Friedrich Osiander was born in 1787.
Johann Friedrich Böhmer was born in 1795.
Johann Friedrich Klotzsch was born in 1805.
Johann Friedrich Cartheuser was born in 1704.
Johann Friedrich Hahn was born in 1753.
Johann Friedrich Böttger was born in 1682.
Johann Friedrich Peter was born in 1746.
Johann Friedrich Reichardt was born in 1752.
Johann Friedrich Schweitzer was born in 1625.