Natassia is of Greek origin and translates to 'born on Christmas'. It's a variant spelling of Natalia, which itself means 'Christmas Day' or 'birth on Christmas'. The name Natassia was popularized in the mid-20th century, particularly after the release of the 1957 film 'Witness for the Prosecution', where a character named Natassia Kagan appeared. It's often associated with elegance and uniqueness.
The name Natassia saw a significant decline in popularity from the late 1980s to the early 2000s.