Just who was the Przewalski after whom Przewalski's horse was named? Or Husson, the eponym for the rat Hydromys hussoni? And whose name is forever linked to Geoffroy's cat? This unique reference provides a brief look at the real lives behind the scientific and vernacular mammal names one encounters in field guides. Arranged in dictionary format, the 1300 entries included here explain the origins of over 2,000 mammal species names, with information about the animals as well as the individual's major contributions to mammalogy and other branches of zoology.