Jacob Hermann may refer to:
Jacob Hermann (mathematician), (1678–1733) Jacob Herrmann, German rugby union international Jacobus Arminius (1560–1609), Latinized name for Jacob Harmensz / Hermann
See also Jakob Hermann (1678–1733), Swiss mathematician Jacob Hermann (designer) (1910-1995), Danish cabinetmaker and furniture designer Jakob Herrmann (born 1987), Austrian ski mountaineer and paraglider pilot