Cad iad na seanlitriúcháin a thá agaibh ar an sloinne..."Ó Sé"

Ó Seadha, Ó Séagdha? agus an mbíonn síneadh fada má tá na litreacha eile ann?

Mac Lysaght cites Ó Séaghdha (hawklike or stately)

Míle baochas a chara

"Ó Sé" is just a bare phonetic spelling which strips the name of it's meaning and dignity.
One might as well write it "o: ʃe:" or simply stick with the English phonetic rendering "O'Shea".

Thanks, have you other alternatives. I have Ó Séaghdha, Ó Séadha and the standard version Ó Sé.

The only correct version to my knowledge is Ó Séaghdha. (Séaghdha = séagh "hawk" + the adjectival suffix -dha.)

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(SL)(GM)

Úsáidtear "Ó Sé" go forleathan leis, níos minicí ná a mhalairt ach táim baoch dod' mholadh.

I think the problem lies in lazy speech.
Obviously the name should be pronounced:
uwa Séyáh. (póg)
If you say Ó Sé, sooner or later, someone will write Ó Sé.

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Is mise, le meas, Deġeḃ.
Is Sasanaċ mé.
Tá beagán Gaoluinn agam.
As Béarla:
I see things differently.
I see things other people can't see.
Sometimes what I see is not there.
Some people call me crazy, and some of them are right.

Lazy speech? I wouldn't say so. No more than the modern pronunciation /glostər/ or /glostə/ for "Gloucester" could be called lazy speech anyway.
Proper nouns seem more susceptible to simplification in pronunciation than ordinary words.

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(SL)(GM)

"Ó Sé" is the common form now, regardless of all the other forms. I'm looking for other spellings, if people have them? If not, no problem, but correct forms?...spare me Conradh na Gaeilge.