Post is a surname of Low German or Dutch origin. It can be either toponymic or occupational (messenger; courier).People with the name Post include: 1  Alfred Post (1926–2013), German footballer. 2  C.W. 3  Post (1854–1914), American foods manufacturer. 4  Danny Post (b. 1989), Dutch footballer.ost is a surname of Low German or Dutch origin. It can be either toponymic or occupational (messenger; courier).