Jacobus is a masculine first name, which is a variant of Jacob. The name may refer to:
Jacobus Arminius (1560–1609), Dutch theologian
Jacobus Barbireau (1455–1491), Flemish composer
Jacobus Barnaart (1726–1780), Dutch merchant
Jacobus Bellamy (1757–1786), Dutch poet
Jacobus Bontius (1592–1631), Dutch physician
Jacobus Nicolaas Boshoff (1808–1881), South African politician
Jacobus Buys (1724–1801), Dutch painter
Jacobus Petrus Duminy (1897–1980), South African academic
Jacobus Johannes Fouché (1898–1980), South African politician and president
Jacobus Cornelis Gaal (1796–1866), Dutch painter
Jacobus Golius (1596–1667), Dutch mathematician
Jacobus Arnoldus Graaff (1863–1927), South African politician
Jacobus Kapteyn (1851–1922), Dutch astronomer
Jacobus Kloppers (born 1937), Canadian composer
Jacobus Mancadan (1602–1680), Dutch painter
Jacobus Anthonie Meessen (1836–1885), Dutch photographer
Jacobus Oud (1890–1963), Dutch architect
Jacobus Hendrik Pierneef (1886–1957), South African landscape artist
Jacobus Ferdinandus Saey (1658–1726), Flemish painter
Jacobus Wilhelmus Sauer (1850–1913), South African politician
Jacobus Spoors (1751–1833), Dutch politician
Jacobus Gideon Nel Strauss (1900–1990), South African politician
Jacobus Swartwout (1734–1827), American general and politician
Jacobus Henricus van 't Hoff (1852–1911), Dutch chemist and Nobel Prize recipient
Jacobus Van Cortlandt (1658–1739), American mayor
Jacobus van Egmond (1908–1969), Dutch cyclist
Jacobus Johannes Venter (1814–1889), South African politician
Jacobus Verhoeff (born 1927), Dutch mathematician
Jacobus Verster (1919–1981), South African general
Donald Lines Jacobus (1887–1970), American genealogist
Marc Jacobus (born 1951), American bridge player
Preston Jacobus (1864–1911), American businessman and politician
Russell Jacobus (born 1944), American bishop
Tim Jacobus (born 1959), American artist
Jacobus, Pennsylvania
Jacobus (name) Wikipedia (Text) CC BY-SA