4 occurrences in 4 dictionaries

Reference: Ithiel

Fausets

2. One of the two to whom (See AGUR spoke by inspiration (Pr 30:1), or "God with me"; perhaps a symbolical name (See UCAL.)

Hastings

1. A Benjamite (Ne 11:7). 2. One of two persons to whom Agur addressed his oracular sayings, the other being Ucal (Pr 30:1). Neither Septuagint nor Vulgate recognizes proper names here, and most modern commentators point differently and tr 'I have wearied myself, O God, I have wearied myself, O God, and am consumed.' So Revised Version margin.

Morish

Ithi'el

1. Son of Jesaiah, a Benjamite. Ne 11:7.

2. One to whom Agur addressed his prophecy. Pr 30:1.

Smith

Ith'i-el

(God is with me).

1. A Benjamite, son of Jesaiah.

Ne 11:7

2. One of two persons --Ithiel and Ucal-- to whom Agur ben-Jakeh delivered his discourse.

Pr 30:1

(B.C. about 900.)