Sosie is of French origin, meaning 'similar'. It is derived from the French word sosie, which is based on the Italian 'sósia', ultimately stemming from Latin 'sosius' meaning 'twin'. This name was popularized in France by Honoré de Balzac's novel 'Père Goriot', where Sosie is a character who stands in for another. It is often used as a female name, but can also be given to males.
"The name Sosie experienced a notable rise in popularity from 2008 to 2014, with an average of over 9 births per year during this period, peaking at 12 births in 2023."