A female given name from Scottish Gaelic, in regular use since the 20th century, first in Scotland, then in England.
"Fiona is a popular female given name that has been widely used in both Scotland and England since the twentieth century."
The name Fiona comes from the Irish word fionn, which means "fair" or "white." It became popular in English after being used by James Macpherson and later adopted by writer William Sharp as a pen name before gaining modern fame through the fictional character Princess Fiona.