Jacobus Is A Boys Name Of Hebrew Origin. Meaning "he Who Supplants," This Name Has A Dignified Feel Thatll Prove Worthy Of Any Little One Whos Wise Beyond Their Years. As An Alternative Form Of Jacob, This Name Can Also Be A Way To Share Your Faith With Baby. Youll Find It In The Jewish Bible And The Old Testament Of The Christian Bible, In Jacob, The Father Of 12 Sons And A Daughter Who Went On To Become The Ancestors Of Israel. Its A Surefire Way To Remind Baby Of How Important Family And Heritage Is.