what is the correct grammar in the irish translation of this address (and why):

13 Ballygassoon Rd

13 Bhóthar Bhaile Cois Abhann
13 Bóthar Bhaile Cois Abhann
13 Bóthar Baile Cois Abhann

the middle one 'sounds' right to me but i dont know why :) basically, I'm asking about how the genitive works here...

grmma

Well if the Irish for "Ballygassoon" is "Baile Cois Abhann" (which by the way means "Town beside a river"), then the Irish for "13 Ballygassoon Road" is:

13 Bóthar Bhaile Cois Abhann

Here's how it works:

"Baile Cois Abhann"

is considered as one definite noun, just like:

Seán
Máire
Sasana
Meiriceá
Fear na mBróg
Muintir na hÁite
Dún na nGall

To put the first four in the genetive, you séimhiú them and change them as appropriate:

Cara Sheáin
Madra Mháire
Muintir Shasana
Scoileanna Mheiriceá

As for the latter four, you simply séimhiú the first noun:

Leabhar Fhear na mBróg
Tuairim Mhuintir na hÁite
Scéal Dhún na nGall

So to put "Bóthar" and "Baile Cois Abhann" together, you get:

Bóthar Bhaile Cois Abhann

(Note that the Irish for "river" is "abhainn", with an i. The genetive case is "abhann". It's in the genetive because of "cois". Beside a woman: cois mná

The 13 doesn't alter it.

grma FnamB!

Another question...any ideas on what "Tullygoonigan" is an anglicization of?

Tulach _ _ _ _ _ _ _ _ _ ??

Maybe something along the lines of:

Tulach Dhún Éigin

I wonder could it be

Tulach Dhún hAgáin (not sure about the spelling/grammar)

The hill of the O’Hagan’s fort (O’Hagan is a common name in the area)