Supplanter
A variant of the name Jacob, derived from the Hebrew name Yaakov. It traditionally refers to the biblical Jacob, who was born holding his twin brother's heel, later interpreted as one who takes the place of another.
Less common today
Jacobi isn't in the latest US Top 1000. It last peaked at #1,016 in 2008.
US births per 5-year period, 1990βpresent (SSA data).
Major League Baseball center fielder
NFL defensive back