Marna is a Swedish variant[1] of Marina and also used as a Danish and Norwegian variant of Maren, which is derived from Maria or Marina.

[2] It has also been used as an English diminutive of names starting with Mar such as Margaret and Scottish variant Marjorie, and of Mary and its variants Marian and Marion.

Marni is also in use as a Danish and Faroese unisex variant.

Marnina is an extended version of the Hebrew name.

[3] [4] Awareness of the name in the Anglosphere increased due to the 1961 crime novel Marnie by Winston Graham and the 1964 psychological film thriller Marnie directed by Alfred Hitchcock.