Alexander Keyserling

Count Alexander Friedrich Michael Lebrecht Nikolaus Arthur von Keyserling (15 August 1815, in Kabile Parish – 8 May 1891, in Raikküla) was a Baltic German geologist and paleontologist from the Keyserlingk family of Baltic German nobility.
A descendant of Herman Karl von Keyserling, Alexander is considered to be one of the founders of Russian geology, making many expeditions on behalf of Nicholas I of Russia.
He was also a botanist and zoologist who wrote Die wirbelthiere Europa's (Vertebrates of Europe) with Johann Heinrich Blasius. This work was published in 1840.
Alexander's nephews include diplomat Heinrich von Keyserlingk and writer Eduard von Keyserling. Archibald von Keyserling, the first leader of the Latvian Navy, was his great grandson. Philosopher Hermann von Keyserling was his grandson.