From BiblePortal Wikipedia

Morrish Bible Dictionary [1]

Son of Eliab the Reubenite: he joined with Korah and Abiram in rebellion against Moses and Aaron, and was with Abiram swallowed up by the earth.  Numbers 16:1-30;  Numbers 26:9;  Deuteronomy 11:6;  Psalm 106:17 . It was rebellion against God in His appointed servants: cf.  Jude 11 . See KORAH.

Smith's Bible Dictionary [2]

Da'than. (Belonging To A Fountain). A Reubenite chieftain, son of Eliab, who joined the conspiracy of Korah, the Levite.  Numbers 16:1;  Numbers 26:9;  Deuteronomy 11:6;  Psalms 106:17. (B.C. 1490-1452).

Fausset's Bible Dictionary [3]

(See Aaron ; Abiram; Korah ) He and Abiram , sons of Reuben, conspired with Korah against Moses and Aaron ( Numbers 16:1-26;  Numbers 16:9-11;  Deuteronomy 11:6;  Psalms 106:17).

Easton's Bible Dictionary [4]

 Numbers 16:1 26:9 Deuteronomy 11:6 Psalm 106:17

Hawker's Poor Man's Concordance And Dictionary [5]

Son of Eliab, one of the rebels with Korah. ( Numbers 16:1) His name is derived from Dath, rites.

American Tract Society Bible Dictionary [6]

One of the rebels, in company with Korah, against the authority of Moses, and Aaron,  Numbers 16:1-50 .

Holman Bible Dictionary [7]

 Numbers 16:1Abiram

People's Dictionary of the Bible [8]

Dathan ( Dâ'Than ). See Korah.

Hastings' Dictionary of the Bible [9]

DATHAN . See Korah.

International Standard Bible Encyclopedia [10]

dā´than ( דּתן , dāthān , meaning and derivation unknown, though the name is found in Assyrian, in the records of Shalmaneser II): The son of Eliab the son of Pallu the son of Reuben ( Numbers 26:5;  Deuteronomy 11:6;  Psalm 106:17 ). He and his brother Abiram, with others, followed Korah the Levite in disputing the authority of Moses and Aaron in the wilderness (Nu 16-17; 26;  Deuteronomy 11:6;  Psalm 106:17 ). Other followers of Korah perished by fire before the tent of meeting, but Dathan and Abiram were swallowed up by the earth, with their families and their goods, at their tents. See Korah .

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [11]

(Heb. Dathan', דָּתָן , Welled , q. d. Fontanus ; Sept. Δαθάν ; Joseph. Δάθαμνος , Ant. 4:2, 2), a Reubenite chieftain, son of Eliab, who joined the conspiracy of Korah (q.v.) the Levite, and with his accomplices was swallowed up by an earthquake ( Numbers 16:1;  Numbers 26:9;  Deuteronomy 11:6;  Psalms 106:17; comp.  Sirach 45:18). B.C. cir. 1618. (See Exode).

Kitto's Popular Cyclopedia of Biblial Literature [12]

Da´than, one of the chiefs of Reuben who joined Korah in the revolt against the authority of Moses and Aaron [AARON].