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Grandad in Irish (Daideo): Meaning, Pronunciation, Usage

The Irish for grandad is daideo, a masculine noun (plural daideonna).
Updated October 2026Report a mistake

How to say “grandad” in Irish

Irish:
daideo
English:
grandad
Word type:
noun
Gender:
masculine, fourth declension
Pronunciation:
“DAD-yoh”  /ˈd̪ˠadʲoː/
Various forms
Plural:
daideonna (grandads)
Genitive singular:
daideo, an daideo (e.g. teach mo dhaideo, my grandad's house)
Genitive plural:
daideonna, na ndaideonna (e.g. scéalta na ndaideonna, the grandads' stories)

What does “daideo” mean?

grandad
An informal, affectionate word for a grandfather, used especially by children.Also: grandpa, granddad, grandfather, granda.

Other Irish words for grandad: seanathair (grandfather)

“Daideo” with the article

The plural of grandad in Irish is daideonna. Here is daideo after the article (an t-alt), in the singular and the plural.

an daideo
the grandad
No change after an
na daideonna
the grandads
Plural: no change after na

“Daideo” in a sentence: Irish examples

Common Irish sentences using daideo, the Irish word for grandad.

Tá mo dhaideo ochtó bliain d'aois.
My grandad is eighty years old.
Chuamar ar cuairt chuig Daideo inné.
We went to visit Grandad yesterday.
Bíonn Daideo ag insint scéalta dúinn.
Grandad tells us stories.
Is breá liom gairdín mo dhaideo.
I love my grandad's garden.
An bhfuil do dhaideo ina chónaí faoin tuath?
Does your grandad live in the countryside?
Thug Daideo deich euro dom do mo bhreithlá.
Grandad gave me ten euro for my birthday.

Other nouns in Irish

More everyday Irish nouns to learn next.

Grandad in Irish: frequently asked questions

What is the Irish for grandad?

The Irish for grandad is daideo (pronounced “DAD-yoh”). It’s a masculine noun and the plural is daideonna.

How do you pronounce daideo in Irish?

Daideo is said like “DAD-yoh” (IPA /ˈd̪ˠadʲoː/).

What is the plural of grandad in Irish?

The plural of daideo is daideonna; with the article, na daideonna means “the grandads”. The genitive plural is daideonna, as in scéalta na ndaideonna (the grandads' stories).

Why does daideo change to dhaideo or ndaideo?

Irish changes the start of some words after certain words. After mo (my) daideo becomes mo dhaideo (lenition), and after ár (our) or i (in) it becomes ár ndaideo (eclipsis).

What is the difference between 'daideo' and 'seanathair'?

'Seanathair' is the standard, neutral word for grandfather, while 'daideo' is the familiar word like 'grandad'. The female equivalent of 'daideo' is 'mamó'.

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