Just like English has my and your versions of me and you, Irish has possessive pronouns.

Unstressed Possessive Pronouns

	Words beginning with	Words beginning with
Pronoun	Consonants	Vowels
mo (my)	lenition	m'-
do (your)	lenition	d'-
a (his)	lenition	no change
a (her)	no change	add h-
ár (our)	no change	no change
bhur (your - plural)	no change	no change
a (their)	lenition	no change

If you want to emphasize ownership, 'My house' or 'Your son', you do not simply stress the words like we do in English. There are special endings to add to words instead, which denote the emphasis. The special endings are added to the thing that is owned or had, not the possessive pronoun. The ending that is added depends on whether the last vowel in the word is broad (a, o, u) or slender (i, e).

Emphasized Possessives

	Words having	Words having
	Slender vowels	Broad vowels
mo (my)	add -se	add -sa
do (your)	add -se	add -sa
a (his)	add -sean	add -san
a (her)	add -sean	add -san
ár (our)	add -ne	add -na
bhur (your- plural)	add -se	add -sa
a (their)	add -sean	add -san

This can sound really odd to an English speaker. To introduce my (imaginary) son, for example, I would say:

Seo mo mhac Fearghal. (This is my son, Fearghal.)

But if I'm in a crowd of people, all introducing their children and I want to point out that my son's name is Fearghal, in English, I'd say:

This is my son, Fearghal.

But in Irish, I don't stress the my. I would instead use the special emphatic ending, and say:

Seo mo mhacsa Fearghal. (This is my son, Fearghal)

It can be a bit disconcerting at first, especially since the special ending isn't stressed, either..