The standard word is Mamó, vocative a Mhamó.

Connemara Irish also uses Maimeo, vocative a Mhaimeo.

What forms are used in other dialects?

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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).

In Donegal people say "Móraí", as far as I know.

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne

Mam mhór or seanmháthair. Although in Munster, in my experience, people are more likely to say seanmháthair for granny and máthair for Mammy than they are to use athair and seanathair for Daddy and Granddad.

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The dialect I use is Cork Irish.
Ar sgáth a chéile a mhairid na daoine, lag agus láidir, uasal is íseal

Any ideas what names are used for a great-grandmother (and great-grandfather) in Connemara-- not so much formal names, but names these people would actually be called by? I asked a friend from Connemara about this and her response was, "Ah, we just call her Gran." Also, is "Gran" a name that would be used commonly?

Thanks!

Not sure whether you wanted the actual terms, as opposed to nicknames like "Nana", but they are sinseanmháthair and sinseanathair, and, as in English, you can add more "sin-" prefixes for extra levels of "great-", e.g sinsinseanmháthair ("great-great-grandmother").

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I'm not a native (or entirely fluent) speaker, so be sure to wait for confirmations/corrections, especially for tattoos.

As well as those by Lon Dubh,

Máthair Chríonna , crionna as the connotation of being old bu it also has the connotation of being sensible and wise, as sense is something you gather with age.

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Please wait for corrections/ more input from other forum members before acting on advice

For specifically great-grandmother, or great-grandfather (not any more greats) in Munster you have Máthair mo sheanathar/sheanmháthar (My grandfather's/grandmother's mother) or Athair mo sheanathar/sheanmháthar. It's actually the most common phrase I've heard.

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The dialect I use is Cork Irish.
Ar sgáth a chéile a mhairid na daoine, lag agus láidir, uasal is íseal

I don't think there would be nicknames for them as they'd be unlikely to be alive any further back that grandmother/grandfather.



I would too.

I never knew either of my grandparents. Three were dead before I was born, and my father's father died when I was a toddler.

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It is recommended that you always wait for three to agree on a translation.
I speak Connemara Irish, and my input will often reflect that.
I will do an mp3 file on request for short translations.
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Thanks, Bríd!

I was nearly going to say - cailleach - but I won't.