Scotch is an excellent drink that comes (mostly) from Scotland. It is spelled
whisky. Irish whisk
ey comes, obviously, from Ireland. It is a very common error to call those who come from Scotland, Scotch. Please don't make that mistake. The Irish people are Celts, Pronounced as a "K", not as in the Boston basketball team. A group of Scots left that blessed shore and settled in Ireland, somewhere in the mists of time, and created their own culture there.
As to the drinking habits of your ancestors, I make no comments. My ancestors are Irish, Scottish, and Welsh, with a bit of German thrown in for variety, which probably explains my fondness for Irish whiskey, Scotch, and beer.

Irish tenors are very good, but the Welsh, oh the Welsh have voices that can break your heart!