North German, Danish, and Dutch: topographic name for someone
who lived near a post or pole (Middle Low German, Middle Dutch
post, from Latin postis), presumably one of some
significance, e.g. serving as a landmark or boundary, or a
habitational name from any of several places in northern Germany
called Post, probably from this word.
occupational name for a mounted messenger or courier Middle Low German
Jewish (Ashkenazic): metonymic occupational
name for a mailman, from German Post ‘mail’.Probably
an altered spelling of German Pfost.
Wikipedia Surname of Low German or Dutch origin. It can be either toponymic or occupational ("messenger", "courier")
1.Occupationnickname fora messenger,apostmanora station master, oraguard,guard, sentry.
2.Livingina'post',a guardora postinsteadofapostal roadwhere the horseswerechanged,comparetheDutchPosttoPrincenhagewhere the horsesofthestagecoachfrom Antwerp toMoerdijkwereexchanged. Theremaystillbe taken into accountin this regardwith a very differentsense ofpost eg footbridge.
3.PosorPost isthe name of aspecies.It may be thenickname ofa fishermanhave been(comparePos).
4.Postcouldbe like thenamesPosthumusandPostma whichfrequentlyoccur inFriesland andmay indicateaposthumously born child ie.a child born after the death ofthe father?