Easton's Bible Dictionary (1897)
Bitter; sad, a symbolical name which Naomi gave to herself because of her misfortunes (Ruth 1:20).
Smith's Bible Dictionary (1863)
(sad, bitter), the name which Naomi adopted in the exclamation forced from her by the recognition of her fellow citizens at Bethlehem.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
MA'RA (bitter). Ruth 1:20. See Naomi.
Hitchcock's Bible Names (1869)
Marah, bitter; bitterness