The given name Eric, Erich, Erikk, Erik, Erick, Eirik, or Eiríkur is derived from the Old Norse name Eiríkr [ˈɛiˌriːkz̠] (or Eríkr [ˈeˌriːkz̠] in Old East Norse due to monophthongization). The first element, ei- may be derived from the older Proto-Norse *aina(z), meaning "one, alone, unique", as in the form Æ∆inrikr explicitly, but it could also be from *aiwa(z) "everlasting, eternity", as in the Gothic form Euric. The second element -ríkr stems either from Proto-Germanic *ríks "king, ruler" (cf.
https://en.wikipedia.org/wiki/Eric
The given name Eric, Erich, Erikk, Erik, Erick, Eirik, or Eiríkur is derived from the Old Norse name Eiríkr [ˈɛiˌriːkz̠] (or Eríkr [ˈeˌriːkz̠] in Old East Norse due to monophthongization). The first element, ei- may be derived from the older Proto-Norse *aina(z), meaning "one, alone, unique", as in the form Æ∆inrikr explicitly, but it could also be from *aiwa(z) "everlasting, eternity", as in the Gothic form Euric. The second element -ríkr stems either from Proto-Germanic *ríks "king, ruler" (cf.
