It was either named after Chief Marin, of the Coast Miwok tribe, or derived from the Spanish name of its eastern bay known as Bahía de Nuestra Señora del Rosario la Marinera in 1775.
- The place name of a county of 252,409 in northern California.
- (etymology) Gudde, Erwin G. (1949). California Place Names: A Geographical Dictionary, p. 204. Berkeley and Los Angeles: University of California Press; Paperback edition (2004). ISBN 0520243173.
- Genitive singular form of Mari.