The given name Eric, Erich, Erikk, Erik, Erick, or Eirik is derived from the Old Norse name Eiríkr (or Eríkr in Eastern Old Norse due to monophthongization).The first element, ei-is derived either from the older Proto-Norse *aina(z), meaning "one, alone, unique", as in the form Æinrikr explicitly, or from *aiwa(z) "everlasting, eternity". The second element -ríkr stems either from *ríks ...