Mardee is of American origin, derived from the French 'Marie'. It means 'sea' and was popularized by the character Marjorie Morningstar in Herman Wouk's novel of that name. The name has gained popularity as a unique, modern choice for girls born predominantly in the United States.
Mardee experienced peak popularity with 19 births in 1941. Afterward, its usage fluctuated, with years like 1960, 1967, and 1970 seeing only 6 births each. The name's usage tapered off by the late 20th century, with a gap of nearly three decades between the last reported birth in 1993.