Wordnet 3.0
NOUN (1)
1. 
 (Greek mythology) a sea god son of Pontus and Gaea; 
 lived in the depths of the sea with his wife Doris and their daughters the Nereids; 
WordNet (r) 3.0 (2006):
Nereus
    n 1: (Greek mythology) a sea god son of Pontus and Gaea; lived
         in the depths of the sea with his wife Doris and their
         daughters the Nereids
Easton's 1897 Bible Dictionary:
Nereus
   a Christian at Rome to whom Paul sent his salutation (Rom.
   16:15).
Hitchcock's Bible Names Dictionary (late 1800's):
Nereus, same as Ner