An bhfuil í seo ceart?

http://www.hairybaby.com/girls/bean-iontach

nó

Bean Iontas
Bean n-Iontas
Bean na n-Iontas

Bean iontach "a wonderful woman"
Bean na nIontas "Wonder Woman" literally "a woman of wonders"

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Múinteoir Gaeilge - Irish Teacher
My "specialty" is Connemara Irish, particularly Cois Fhairrge dialect, but I can also speak Ulster and Munster Irish with native-level pronunciation.
Is fearr Gaeilge ḃriste ná Béarla cliste, cinnte, aċ i ḃfad níos fearr aríst í Gaeilge ḃinn ḃeo na nGaeltaċtaí.
Gaeilge Chonnacht (GC), go háraid Gaeilge Chois Fhairrge (GCF), Gaeilic Uladh (GU), Gaelainn na Mumhan (GM), agus Gaeilge an Chaighdeáin Oifigiúil (CO).

GRMMA!

Wonder (see what I did there?) if one could one get away with "Bean nIontas" for shirt-speak which is sometimes less finicky about grammatical correctness (i gcanúint t-léine??)? That's a lot of n's and a's there right at the bridge of those two words.

No...that wouldn't work. "Bean Iontas," maybe.

Redwolf

Wonder Woman is a particular person - 'Bean Iontach' means 'any' wonderful woman - not anyone in particular. You might have to put it like:
An Bhean Iontach
or
Bean na nIontas
Oddly enough, you might hear many a one reading this as something like:
Bean na nIontaisí
but I would have to write
Bean na nIontas


Wonder Woman if I remember is a bit of a fighter / a warrior so perhaps also down the road of:
"Bean na nGníomhartha Gaisce"
maybe shortened to something like:
"An Bhean Ghaisce"
or
Bean an Ghaisce

... with context being important...

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Bí cinnte de go nglacfaidh triúr le gach aistriúchán a thabharfar.
Be sure to get three in agreement with a translation given.