|Easton's Bible Dictionary|
Jove-nourished, rebuked by John for his pride (3 John 1:9). He was a Judaizer, prating against John and his fellow-labourers "with malicious words" (7).
Int. Standard Bible Encyclopedia
di-ot'-re-fez (Diotrephes): A person mentioned in ; 3Joh 1:9, 10 as contentiously resisting the writer's authority and forbidding others from exercising the Christian hospitality which he himself refused to show.
The words "who loveth to have the preeminence, among them" may indicate that he was a church official, abusing his position, chief stars in the constellation of the Twins. Some 4,000 years B.C. they served as pointers to mark the beginning of the new year by setting together with the first new moon of springtime. The constellation of the Twins was supposed to be especially favorable to sailors, hence, ships were often placed under the protection of the twin gods.
Diotrephes (1 Occurrence)
3 John 1:9 I wrote to the assembly, but Diotrephes, who loves to be first among them, doesn't accept what we say. (WEB KJV WEY ASV BBE DBY WBS YLT NAS NIV)