I just thought though, in the end, wouldn't everything be your share of something?

The best of luck with your research!

When you have it all figured out, get back to us and let us know the definitive rules/regulations/dialact differences/urban anomalies/old Irish versus modern Irish variances and the endless exceptions......

Then mhwombat can make up a game and we'll all play the game

And then once every few months the game thread will be revived and we'll all relearn all that we have forgotten and we'll play the game again and then a few months later.......

You know the drill!

(Braoin, you have to start with figuring it all out, in case you bypassed that!)

Edited to include Aislingeach's exceptions!

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And the exceptions! Don't forget the exceptions! They're a huge part of Irish grammar rules.

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Táim ag foghlaim Gaelainn na Mumhan

Tá fáilte roim nach aon cheartú!
I am a learner. Any translations offered are practice and should not be used unless confirmed.

You are so right. I have edited my post especially to include them!

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Irish is truly an exceptional language.

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Exceptions... as sure as I'd never lie to you we wouldn't know the meaning of the word; except for now and then, and here and there, or b'fhéidir every so often...

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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.

Cliste, an-chliste!

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Táim ag foghlaim Gaelainn na Mumhan

Tá fáilte roim nach aon cheartú!
I am a learner. Any translations offered are practice and should not be used unless confirmed.

For what it's worth, TYI [Dillon and Ó Cróinín] on page 50 say:
Cuid "share" is used with a possessive when the thing possessed is a quantity of something: a chuid airgid "his money", mo chuid coirce "my oats", a gcuid oibre "their work".
This accords very well with the use of the same word in Scottish Gaelic - cuid, codach - a share of something.

FWIW, Learning Irish has:

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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).