Kopeikin

Kopeikin or Kopeykin (Копейкин) is a Russian masculine surname, its feminine counterpart is Kopeikina or Kopeykina. It may refer to
 * Alexei Kopeikin (born 1983), Russian ice hockey forward
 * Boris Kopeikin (born 1946), Russian football player
 * Sergei Kopeikin (born 1956), American theoretical physicist