Mareen is of Irish origin, meaning "sea-born" or "song of the sea." It's a variant spelling of the name Marine, which itself is derived from the Latin word for sea, "mare." The name Mareen is often associated with the sea and water, reflecting its maritime origins.
The name Mareen was most popular in the years following World War II, with a peak of seven births in 1940 and consistent popularity throughout the 1940s and early 1950s. However, it saw a decline thereafter, with fewer than six births per year from 1960 onwards, totaling 60 births over this period.