From BiblePortal Wikipedia

Smith's Bible Dictionary [1]

Jo'nan. ( perhaps a contraction of Johnana , Gift or Grace Of God). Son of Eliakim, in the genealogy of Christ .  Luke 3:30. (B.C. before 876).

Fausset's Bible Dictionary [2]

Johanan, in Christ's genealogy ( Luke 3:30); compare, the similar names, as often occurs in a family,  Luke 3:26-27.

Holman Bible Dictionary [3]

 1 Chronicles 26:3 Luke 3:30Jonam

Morrish Bible Dictionary [4]

Son of Eliakim in the genealogy of the Lord Jesus.  Luke 3:30 .

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [5]

( Ι᾿Ωνάν , perh. contr. for Jonathan or Johanan or i.q. Jonas the son of Eliakim and father of Joseph among the maternal ancestors of Christ ( Luke 3:30). He is not mentioned in the Old Test. B.C. considerably ante 876. (See Genealogy Of Christ).