Easton's Bible Dictionary (1897)
Man of the dart, the son of Enoch, and grandfather of Noah. He was the oldest man of whom we have any record, dying at the age of nine hundred and sixty-nine years, in the year of the Flood (Gen. 5:21-27; 1 Chr. 1:3).
Smith's Bible Dictionary (1863)
(man of the dart), the son of Enoch, sixth in descent from Seth, and father of Lamech. (Genesis 5:25-27)
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
METHU'SELAH (man of dart, or he dies and it is sent - namely, the Flood), the son of Enoch, and, according to Hebrew chronology, 969 years old when he died, in the first year of the Flood. The longest-lived man was the son of the saintliest of his time. Gen 5:27; 1 Chr 1:3.