The name Cooper does appear in Ireland and currently in the online white pages for Kilkenny there are 12.
A cooper was originally the name of a person who made wooden stave containers such as barrells and other similar containers.
1901 Census 1,821 Coopers of which 16 are named David
1911 Census are 1,811 Coopers, 12 named David
in various counties.
In the Griffith Valuations - used as a census substitute - for the years 147-1864 there wee 628 in Ireland.
I think of it as an English name but there were plantations of English and Scot farmers to Ireland, the British government had policies of bringing Protestants to Ireland to outnumber Catholics. Large numbers of people were called 'plantations'.
There were no Cooper's in Kilkenny in the Griffith Valuation other counties you can find these for free atwww.askaboutireland.ie
You don't say what years you are looking for. Do you know where in Ireland David John Cooper was from? When was David John Cooper born?
A bmd website for Ireland that has all but six counties participating has only 12 David Coopers from 1770.
1873, Antrim, 1870 Armagh, 1865 Antrim, 1850 Antrim,
1846 Tyrone, 1841 Armagh, 1823 Cork
Do you know what county your David Cooper was from?
The answer you received are of a joking manner, is your questions a joke or are you seriously looking.