From BiblePortal Wikipedia

Hawker's Poor Man's Concordance And Dictionary [1]

The son of Raphu. (See  Numbers 13:9) He was one of those sent by Moses to spy the land of promise. His name, if derived from Palat, signifies deliverance. It should seem by  2 Samuel 23:26, that there must have been a place called Palat, for Helez one of David's worthies, is said to be the Paltite or Pelonite. (See  1 Chronicles 11:27)

Hastings' Dictionary of the Bible [2]

Palti 1. The Benjamite spy (  Numbers 13:9 ). 2. The man to whom Michal, David’s wife, was given by Saul (  1 Samuel 25:44 ). In   2 Samuel 3:15 he is called Paltiel. See following article under No. 2.

Holman Bible Dictionary [3]

 Numbers 13:9 2 1 Samuel 25:44 2 Samuel 3:15-16 Paltiel

Smith's Bible Dictionary [4]

Pal'ti. (Whom Jehovah Delivers). The Benjamite spy, son of Raphu.  Numbers 13:9. (B.C.1490).

Morrish Bible Dictionary [5]

Son of Raphu, a Benjamite.  Numbers 13:9 .

Easton's Bible Dictionary [6]

 Numbers 13:9

Fausset's Bible Dictionary [7]

 Numbers 13:9.

International Standard Bible Encyclopedia [8]

pal´tı̄ ( פּלטי , palṭı̄ , "Yah delivers"):

(1) One of the "searchers" of Canaan sent by Moses ( Numbers 13:9 ), representing Benjamin in the expedition ( Ezekiel 13:9 ).

(2) The man to whom Saul gave Michal, David's wife, after the estrangement ( 1 Samuel 25:44 ). He is "the captain of the people" of 2 Esdras 5:16 ("Phaltiel," margin "Psaltiel"). In  2 Samuel 3:15 , he is named "Phaltiel" (the King James Version), "Paltiel" (the Revised Version), and is there mentioned in connection with David's recovery of Michal.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [9]

(Heb. Palti', פִּלְטַי , my deliverance; Sept. Φαλτί ), son of Raphu of the tribe of Benjamin, and one of the twelve spies sent out by Moses ( Numbers 13:9) B.C. 1657.