Keeper of the Hippo Obaysch
Charles Canning, 1st Earl Canning, also known as The Viscount Canning and Clemency Canning, was a British statesman and Governor-General of India during the Indian Rebellion of 1857, and the first Viceroy of India after the transfer of power from the East India Company to the Crown of Queen Victoria in 1858 after the rebellion was crushed
John Edward Gray was a British zoologist. He was the elder brother of zoologist George Robert Gray and son of the pharmacologist and botanist Samuel Frederick Gray. Gray was keeper of zoology at the British Museum from 1840 until 1874, before the natural history holdings were split off to the Natural History Museum. He published several catalogues of the museum collections that included discussions of animal groups and descriptions of new species
Frederick Charles Hengler was an English circus proprietor. From 1857 he established permanent circuses in several cities
Raja Rajendra Mullick was an Indian art lover and philanthropist. He was the scion of the Mullick family of Chorbagan and built the Marble Palace of Kolkata. When the Zoological Gardens was set up in 1876, he donated many birds and animals from his personal collection. They were kept in a house named the Mullick House inside the zoo