- marsh, marshland, fen, fenland - low-lying wet land with grassy vegetation; usually is a transition zone between land and water; "thousands of acres of marshland"; "the fens of eastern England"
--1 is a kind of wetland
- Marsh, Reginald Marsh - United States painter (1898-1954)
--2 is a kind of painter
- Marsh, Ngaio Marsh - New Zealand writer of detective stories (1899-1982)
--3 is a kind of writer, author