The Jacobus Last Name

Records tie Jacobus closely to Jacob. Its meaning, shared with Jacob, is “From Jakob (Jacob)”.

• The ending -us in Jacobus marks an German derivative of the root behind Jacob.
• Similar-sounding surnames on Herald Lab: Jacobs and Jakobs.
• Local scribes, dialects and emigration all left their mark on how the name was written.
• 2,383 Americans were listed as Jacobus in the 2010 census. That is enough to place it in the top 25,000 American surnames.
• Related forms: Jacobsen, Jacobsson and Jacobsohn.

Family crest and blazon

Arms linked to Jacob and its spellings were granted to individual families; our heraldry team traces which line they belonged to. Want more than a summary? See the Jacobus family name pack.