Coypu described by Juan Ignacio Molina in 1782 as "Mus coypus", a member of the mouse genus. The genus "Myocastor" was assigned in 1792 by Robert Kerr. Geoffroy Saint-Hilaire, independently of Kerr, named the species "Myopotamus coypus", and it is occasionally referred to by this name. Four subspecies are generally recognized: "M. c. bonariensis", the subspecies present in the northernmost (subtropical) part of the coypu's range, is believed to be the type of coypu most commonly introduced to other continents. Comparison of DNA and protein sequences showed that the genus "Myocastor" is the sister group to the genus "Callistomys" (painted tree-rats).
Rosie (given name) has been rare as a given name for newborns in the United States since the 1980s. Rosie (given name) Rosie is a feminine given name of English origin. It is a diminutive form of the English language given name Rose, which is of Latin origin. Similar diminutives in other languages include: ' becoming ' in Spanish, and ' becoming ' in Slavic languages. Rosie is a nickname for variations of "Rose" such as "Rosalie", "Rosemary", "Roseanne", "Rosalyn", and others. Historically, Rosie has been a reasonably popular given name for infants in England and Wales during the early 21st century, as