Otto Staudinger (German, 1830 – 1900)
Saverio Manetti (Italian, 1723 – 1785)
P. C. Skovgaard (Danish, 1817 – 1875)
George Hudson (New Zealander, 1867 – 1946)
Carl Pischinger (Austrian, 1823–1886)
Johann Friedrich Naumann (German, 1780 – 1857)
Friedrich Carl von Scheidlin (Austrian, 1822-1913)
James Ward (English, 1769-1859)