Let’s start with the formalities, “grandmother” and “grandfather.” Most children don’t actually use these in talking with the actual grandparent but they’re useful in narrative and in general discussion. There are three pairs of terms, each building on the words “máthair” (mother) and “athair” (father). :
seanmháthair, seanathair: based on the prefix “sean-“ (old)
máthair chríonna, athair críonna: based on the adjective “críonna” (wise, prudent, aged). Please note: despite the endearing bit of misinformation currently circulating on the Internet (sites will remain nameless), these terms do NOT mean “mother of my heart” and “father of my heart.” Those phrases would be based on “croí” (heart), not “críonna” (wise).
máthair mhór, athair mór: based on the adjective “mór” (big, great). I’ve mostly heard this term in Donegal.
For the more familiar terms, there are “Mamó” and “Móraí” for “grandma,” and “Daideo” for “grandpa.”
Using these words is one way that Irish words can be come part of a child’s life, and perhaps stimulate further study of the language later. Needless to say, the terms can now grace mugaí (mugs), t-léinte (t-shirts), or léinte aclaíochta (sweatshirts, lit. “exercise shirts”). Or, for that matter, any other merchandise that allows you to send in customized text for printing.
One curious feature of all of these terms is that none of them are used to create the words “grandchild,” “grandson,” or “grand-daughter.” So how do you do it? Bhuel, ag bogarnach ar an aill sin (Well, hanging on that cliff), slán go dtí an chéad bhlag eile (goodbye until the next blog).
Bhur mblagálaí – Róislín

7 Comments
Will someone please call me so I can hear how to pronounce Mamó” and “Móraí”
for Grandmom. The Irish pronunciation. 610 325 6922
Thanks,
Francilene
Dia dhuit, a Francilene,
Mamó – ma-MOH, with the stress on the second syllable
Móraí – MOR-ee. The “aí” vowel cluster is simply “ee.”
Note that the emphasis is on different syllables, indicated here by caps.
Also, if you’re using these in a family context, you might want to note that “Mamó” and “Móraí” are typically used by children to the grandmother. Additionally parents might use the terms when indicating the child’s perspective, like “Give that back to Mamó, now”. Just like in English where a mother will refer to her own mother as “Grandma,” “Mom-mom,” etc. to show the child’s perspective. The more formal word, “grandmother,” is “seanmháthair” [SHAN-WAW-hir] or its variants, as discussed in the article.
All the best – Roslyn
Can you tell me if Marnie is also a nickname for Grandma, and if so, is it pronounced like it is spelled?
Dia dhuit, a Rose,
Thank you for your interest in the Irish Blog. I don’t know of Marnie being a nickname for Grandma. You probably just read the previous blogs about terms for grandparents, etc., in Irish. Mamó or Maimeo would be the typical Irish words for “grandma” or “granny,” as opposed to “grandmother,” which is a little more formal (seanmháthair, máthair mhór, or máthair chríonna). I do recall “Marmee” (with two m’s) from Little Women, which the girls called their mother. I’ve read that “Marnie” comes from the Scandinavian “Marna” and means “from the sea.” I can’t vouch for Scandinavian definitions but you might want to look into that. All the best!
how would you pronounce Maimeo?
mam-yoh, the “y” is in there just to give the “slender m” pronunciation, like the “m” in English “mew” or “muse.”
One other point is to remember that the “eo” is just one vowel sound “oh,” not like “Leo [lee-oh] the Lion” or “CEO.”
Feicim gurbh í seo do cheist. Tá an ceart agat. Úsáidtear “Grandma” agus Grand(d)ad i mBéarla na hÉireann. Seanathair, seanmháthair, srl. i nGaeilge na hÉireann.
Dúirt tú:
12-18-2010, 11:16 PM Hopes, Senior Member, Join Date: Jan 2007
12,491 posts, read 8,897,338 times; Reputation: 4703
Quote: (Originally Posted by Amelorn) My grandparents are mostly Irish, so it’s Grandma and Grandad (it should be Granddad, but we don’t use that spelling) as used in the British Isles.
I don’t think those are Irish names. / My mother’s parents were both 100% Irish, straight off the boat as children. / We called them Grandmother and Grandfather. / If you look up Irish names for grandparents, none of your names or my names are listed.
Mór? Críonna? or Sean? — Grandparents By Any Other Name! | Irish Blog
Read more: http://www.city-data.com/forum/parenting/1154305-names-old-grandfather-grandmother.html#ixzz19gxDIWoW
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