Boy name origins & meanings
- American : Spiritual
Family name origins & meanings
- Dutch and North German : status name for a sexton, Middle Dutch coster(e).
- North German (Köster) : occupational nickname or status name for a day laborer who owned no land, from Middle Low German koster, from kossater ‘cottager’.
- South German : occupational name for a wine taster, from kosten ‘to taste’.
- Jewish (Ashkenazic) : occupational name for a grocer or provisioner, from German Koster ‘provisions’, ‘foodstuffs’ + the agent suffix -er.