“Spirit of wisdom and understanding” is one of the three names given to the Holy Spirit in a verse of Isaiah. Isaiah prophesied that the messianic shoot or branch would be anointed with the Spirit of the Lord. Each of the names for the Spirit is a doublet that highlights different characteristics of Jesus (Yeshua‘).
The Hebrew words for wisdom and understanding are close synonyms; they both have to do with the gift of discernment of truth. Jesus often demonstrated that supernatural gift in His ministry on earth. Paul used another name of Jesus, the Power of God & Wisdom of God.
Spirit of wisdom and understanding in Hebrew:
Ruakh khokhmah uvinah
Strong’s Concordance numbers: 7307, 2451, 998
Bible reference: Isa. 11:2
Then a shoot will spring from the stem of Jesse,
And a branch from his roots will bear fruit.
2 The Spirit of the Lord will rest on Him,
The spirit of wisdom and understanding,
The spirit of counsel and strength,
The spirit of knowledge and the fear of the Lord.
3 And He will delight in the fear of the Lord,
And He will not judge by what His eyes see,
Nor make a decision by what His ears hear. (Isaiah 11:1-3)