Hi could someone tell me what "Iron Woman" would be in Irish.
One friend said it's mna iarann and the other said its
bean iarann.
Would really appreciate the help, Thanks!

Bean iarann - is what I would suggest, but it might be bean iarainn (of iron). mná is the plural (women).
If you'd wait a bit, I'm sure somebody here will know better than I would.

I'd definitely have iarainn in the genitive:

Bean Iarainn "Iron Woman" literally "Woman of Iron"

(Mná is not only the plural of bean but also the genitive singular "of a woman", which might be where your friend saw it. For example, tionchar na Mná Iarainn "the Iron Lady's influence", referring to Margaret Thatcher.)

_________________
[hr]Múinteoir Gaeilge - Irish Teacher[/hr]
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).

Thank you so much for your quick reply!

I did an triathlon in Ireland and I'm thinking about getting a tattoo

Bean Iarann it is.

I'm not sure you've seen what Yer Man has said - that's to say that you need a genitive in there (I know it sounds painful, but if it's for getting inked....) bean iarainn is the answer he gave.

Thanks, I just reread it.
That would have been terrible!