I am researching the same Frizells and am persuaded that "my Frizelles" were originally Frasers from Scotland.
There is some very strong oral history from Frizells who migrated to various parts of the world that they were Frasers and from looking at some basic things about the Palantines, they don't seem to fit there. They were no doubt very entwined with the Palantines near Old Ross and Gorey, but I think that is because they were land managers and surveyors for Abel Ram. Many of my Frizelles have Fraser as a middlename.
I will attach a few things that I have found.
My own current area of interest is of linking "my" Frizelles to the Joseph, William and Sutton Frizells. Clearly they are related - they live in the same area and there are lots of other connections, but I am currently puzzled about the exact connection. My oldest confirmed Frizell is Charles Frizell Snr. who was a surveyor. (I think, but cannot 100% confirm that his father (also Charles) was the first Frizell from my branch to arrive in Ireland.) Charles Senior (the surveyor) lived about 1706 to 1775. His two sons Richard (1730-1804) and Charles Jnr (1738-1812) were also surveyors. Richard built a home, called Beaufort house in Rathfarnham, Dublin. (Beaufort was the land of the Frasers of Lovat). Charles Jnr built a house at Castlekevin in Wicklow. Ensuing generations seemed to all have sons named Charles and Richard, so things can get confusing.
Here is a deed that connects Richard Frizell, the surveyor, to William Frizell "the elder" and his sons William "the younger" and Charles. Deed 154675 1765 William Frizell Elder and Younger convey Old Ross Property to Richard Frizell, 22 March 1765, Transcripts of memorials of deeds, conveyances and wills, 1708-1929, 394, 154675, Film 008088419, Image 551, Family Search,
https://www.familysearch.org/ark:/61903/3:1:3Q9M-CSN1-89Q4-Z?i=550&cat=185720&lang=en Maybe William the Elder and Charles Sr Surveyor were brothers? And I think William the Younger and his brother Charles had descendents named Joseph and Sutton and Richard, who are also confusing since there are many contemporaneous cousins with the same names.
Anyway, if anyone out there has information about exactly how the surveying Frizells fit in with the William and Josephs and Suttons, I would be grateful to hear about it.
I have tons of other Frizell research that I am happy to share. My problem is I am a dogged researcher, but not a great organizer. So currently I am trying to create a well documented tree on RootsMagic, which I will eventually share via Ancestry or Gedcom to help others find my research and collaborate. I am also open to just dumping some of my documents into shared Google folders or drop box.
Anyway, take a look at the deed I reference above and also the attachments I am uploading about the Fraser and Scottish connections and be in touch if you want to collaborate further.