So type a letter into Google, and take the first entry from the auto-complete. Repeat for each letter a to z to get the full alphabet
a - aer lingus
b - bebo
c - currency converter
d - done deal
e - ebay
f - facebook
g - gmail
h - hotmail
i - irish times
j - jobs.ie
k - karen millen
l - lotto.ie
m - meteor
n - new look
o - o2.ie
p - paddy power
q - quinn direct
r - ryanair
s - sky news
t - ticketmaster.ie
u - ulster bank
v - vodafone.ie
w - wikipedia
x - xtra vision
y - youtube
z - zara