seantuismitheoirí
I was born in Ireland! Have Irish parents, grandparents, great-grandparents. I'd say that's why I'm Irish!
If both your parents are one fourth Irish, that means that each of them has one out of four grandparents who were fully Irish (or something equivalent). Your parent's grandparents are your great grandparents, and you have a total of 8 great grandparents. Two of your great grandparents were fully Irish, one from each of your parents. You have 2 fully Irish great grandparents out of a total of 8 great grandparents, 2 out of 8 is 1/4 so you are one fourth Irish.
Aston's grandparents and mother are Irish.
Not necessarily, one or both of your parents, grandparents or great-grandparents probably came from Ireland so the fact that you have an Irish surname suggests that you have some Irish ancestry.
No.
As English is the main language spoke in Ireland, you would say "Family". In Irish the word is Clann, similar to the English word clan.
Seanathair agus seanmháthair (grandfather and grandmother)
The Yiddish word for grandparents is "גרויעס" (groys).
The grandfather and the grandmother an seanathair agus an tseanmháthair
No. You can only gain Irish citizenship from descent if your grandparents were born in Ireland. Unfortunately you seem to have missed by a generation. You could still gain citizenship by actually residing in Ireland.
Not that I'm aware of, although he can claim Irish dual-citizenship as his grandparents were both Irish.
Your grandparents will be very proud of you, also.