Stress generally falls on the first syllable but, as Ó Corráin and Maguire note, “[t]he pronunciation of Old Irish is uncertain anyway and Irish medieval scribes, it may be added, treated the forms (and pronunciations) of names with great freedom.”

á is like dawn

a is like apple

é is like day

e is like up

ei is like eye

í is like tree

i is like big

ó is like snow

o is like ah

ú is like mood

u is like uh

Abbán Ab-án

Adomnán Ú-nán

Áed É

Ailbe Al’-ve

Ailerán Al’-ar-án

Ailill Al’-il’

Aoife Í-f’e

Becnat B’ag-nit’

Benén B’an-ón

Béoán B’ó-án

Bríg Br-í

Bruinnech Br’ún’-ach

Cainnech Kon’-ach

Canair Kon’-er

Ciarán K’íar-án

ColmCille Kul-am Kil’e

Colman Kul-mán

Comgán Kú-án

Conláed Kun-lé

Cranat Kran-it

Crón Krón

Cuach Kúach

Cuimíne Kim-ín’

Cuirithir Kir’-i-hir’

Cummen Kum-an

Daig Dei

Damhnad Dav-nit’

Darerca Dar-ark-a

Darlugdach D’ar-lúach

Derbfiled D’er’-vil’e

Derbforgaill D’ar-vor-gil’

Diarmaid D’íar-mit’

Dígde D’í

Dubthach Du-fach

Eithne Eh-n’e

Ernéne Ér’n’-ín

Fedelm F’ed-elm

Finnian F’inn-ín

Gobnait Gub-nit’

Gormlaith Gurm-la

Ibar Iv-ar

Íte Íd-e

Laisréan Los’-r’án

Laithche La-he

Lasasir Los-ir’

Líadain L’ía-dan’

Loíguire Lé-r’e

Luchtighearn Lú-hiarn

Medb Mév

Mél Mel

Midnat M’í-nit’

Mochaomhóg Mu-chév-óg

Mochuda Mu-chud-a

Molaise Mu-los’e

Monenna (Moninne) Mu-ná-ne

Mór Mór

Muirchú Mir-chú

Ness N’as

Orbile Ur-vil’e

Rignach R’ín-ach

Rodán Ru-dán

Ronnat Rón-it’

Ruadán Rúán

Sadb Sív

Samthann Sav-han

Sarnat Sár-nit’

Scothín Sku-hin’

Segnat S’én-it

Sláine Slan’-e

Tigernán T’íar-nán

Tírechán T’ír’-ach-án

Úallach Úal-ach

Ultán Ul-tán