A pretty tall order in Ireland many church records that early haven't survived.
Between 1847-1864 Griffith's Valuation of land took place throughout Ireland. There were 1,478 Crowley's and of these
78 were named Denis. The majority were from Cork, with 1 from Clare, 11 from Kerry, Tipperary Nth. 2, Waterford 2.www.askaboutireland.ie
There is a not for profit but fee paying website, an Irish History Foundation www.rootsireland.ie
(4 counties do not belong both Clare & Kerry included)
You should be able to find a birth of a Denis with a father
Denis in 1817 without a county from this website. If no
success they either come from a parish whose records haven't survived that early or either Clare or Kerry.
Kerry & Cork does have free record's on www.irishgenealogy.ie