Seanathair agus seanmháthair (grandfather and grandmother)
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.
seantuismitheoirí
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.
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.
I do have Irish nationality but it's not because my parents are Irish. I was born in Co. Mayo in 1997 and at the time if you were born in Ireland you get Irish nationality. That's changed now though.
Jimmy Hoffa's ancestry was mainly German and Irish. His paternal grandparents were German immigrants while his maternal grandparents were Irish immigrants. Hoffa was born in Brazil, Indiana in 1913 to a working-class family with roots in the Midwest.
His paternal grandparents are Irish, so he could play for Ireland.