Marny is of Latin origin and means "of the sea." It is often used as a nickname for Mary, but it can also stand alone as a given name. The name Marny has been popular in various forms throughout history, with its peak usage occurring during the 1940s and 1950s. Today, Marny remains a uncommon yet distinctive choice for parents seeking a unique name for their daughter.
"Marny was a popular name choice for girls from the mid-1940s to the late 1970s, with peaks in popularity in the late 1960s and early 1970s."