Koplin
Koplin is a surname of Eastern European origin. It is most likely derived from a personal name, potentially a diminutive of Jacob or a similar name. The surname is found in various countries, including Russia, Poland, and the United States, due to migration and historical settlement patterns. Like many surnames, variations in spelling may exist, arising from different transliteration methods or regional dialects. Genealogical research is necessary to determine the specific origins and historical context of any individual or family bearing the name Koplin.