Ivan Donaurov 1806–1849 Source: Wikimedia Commons People from the Same Era Ludwig Georg Karl Pfeiffer 1805–1877 botanical collector, botanist, conchologist, malacologist, pathologist, physician, zoological collector, zoologist Kassel Alvah Crocker 1801–1874 politician Leominster Eliphalet Trask 1806–1890 politician Monson Samuel J. Gholson 1808–1883 judge, lawyer, politician Madison County Otto Fridolinus Fritzsche 1812–1896 Protestant theologian, church historian, librarian, theologian, university teacher Doberlug-Kirchhain Piapot 1816–1908 warrior