Anina is the German diminutive of Anna, the Latinate form of Hebrew given name Hannah or Channah meaning “favor” or “grace”. Anina is also the name of a town in Romania where the oldest human remains in Europe were found in a cave; the remains were nicknamed John of Anina (or Ion din Anina in Romanian). The name comes from a different source, a Romanian word that means “to hang” or “to hook” which comes from the Latin root *anninare “to rock” fron *ninna (to cradle, to swing).
Another possible origin I’ve seen for Anina is that it is an Aramaic female name meaning “answer my prayer”.
Origin: Hebrew, Latin, Aramaic