Dead Eileen .
I wish you all the success in tour reserach but you will find it very difficult.The Hanahoe Family prior to the 1900's were a very back ward sort of people( info I have gatherd from elders)They didnt know any English , or reading or writing.
I have searched the graves in the family graveyard in Killmurry , Crosmolina co mayo , but could only go back 5 generations as back then only the rich could get Head stones.
I will try to do a bit of talking to the old Hanahoes and see if they know anything else from their grandparents.

Your best bet in researching the family name would be to start in Crosmolina in the Heritage center , then work your way down to Belmulit and the prehistoric Ceidge fields.

Another good place to try would be ballina in mayo . There is a big hill there with small ruins localyu known as " Hanahoes hill"

Best of luck
Michael.