Not sure if it's a direct relation but I can trace my lineage precisely to Co Kerry.
My great, great Grandmother was Julia Stack (Born: December 6, 1873 Mt Forrest, Ontario, Canada) whom married Charles Patrick Payment (where a place name with the name Payment still stands as a reminder of a town on Sugar Island beside Sault Ste. Marie, MI) Julia V. Stack's father was Patrick Stack (Birth:17 Mar 1840 Killarney, Kerry, Ireland Death:27 JAN 1922 Mount Forest, Wellington County, Ontario, Canada). Patrick Stack's father was John Stack Sr (BIRTH 1805 • County Kerry, Ireland DEATH 6 DECEMBER 1863 • Arthur Twp., Wellington North, District Peel, Ontario, Canada). John Stack Sr's father seems to be; Robert Stack 1774 (married Ellen Keadahan Caddigan ) B: Birth1774 • Co. Kerry, Ireland D:Death Bef. 1875 • Ireland. Robert Stack's father seems to be: Richard Rickard Stack BIRTH 1750 • County Kerry, Ireland. In with there is a will related to land on Ancestry DNA, but with their exorbitant prices I refuse to pay it- which unfortunately means I don't have more access to validate things. But this is what I have.
Stack Crest has been added to the older generations making me think it is a direct lineage. A grandaughter of Robert Stack apparently married a family in Minnesota- my Ancestry DNA show random matches to people in minnesota...perhaps that's why.
These are all on my family tree, I'd be happy to screenshot it if you don't have a paid profile. Reach me at: Paulina Payment on facebook and just mention / link this article if you happen to return to this site sometime. I can connect you with my cousin who is better equipped financially and has a higher interested in accuracy and detail which I don't have the time for for these in-depth looks deeper.
I am Irish, German, and English- with a touch of welsh and nordic: Norway and Sweden. By 6th generations I believe you lose anything that would show up in your dna results which is why I lack french- though before my DNA results were refined I did have france listed. I am on AncestryDNA. Ancestry DNA still matches me to some distant ancestors in England.
Richard/Rickard Stack is included in the Irish Records Extraction Database, which may be of use to you if we're related/of direct lineage.
Serendipity brought me to land myself by happenstance in Killorglin co Kerry after a trip i took to celebrate graduating from university. There I stumbled across an old closed down film store under the name of Stack and got to talking to some locals in the area who informed me that they, too, had moved on.
Recent research informed me that the Stacks held a seat in Co Kerry, overseeing several (6?) towns where one had a nickname of Stackstown. Unfortunately, because they supported Ireland and fought against the English, they ended up having their lands and co seat taken from them. From there they dispersed. I imagine this is why Julia and her parents came to south eastern Canada.
Canada is a highly common route for many Irish folks to come through during the migrations.
Good luck!