Supplanter
A rare spelling variant of the Hebrew name Jacob. It is derived from the name Ya'aqov, which traditionally refers to one who follows or replaces another, based on the biblical story of Jacob and Esau.
Less common today
Jacobb isn't in the latest US Top 1000. It last peaked at #3,677 in 1995.
US births per 5-year period, 1990βpresent (SSA data).