Irish Americans are Americans who have full or partial Irish ancestry or citizenship.
Charles Carroll, the sole Catholic signer of the U.S. Declaration of Independence, was the descendant of Irish nobility in County Tipperary. Signers Matthew Thornton, George Taylor were born in Ireland and were "Ulster" Scots, while Thomas Lynch Jr., for example, was Protestant; he was of Irish ancestry and retained a strong Irish identity.
"Leacht Cuimhneacháin na nGael", Irish famine memorial located on Penn's Landing, Philadelphia
Gravestone in Boston Catholic cemetery erected in memory of County Roscommon native born shortly before the Great Famine
Thomas Ambrose Butler, an Irish Catholic priest, was a leading voice in urging Irish immigrants to colonize Kansas
Scotch-Irish Americans are American descendants of primarily Ulster Scots people, who emigrated from the Ulster province of Ireland to the United States between the 18th and 19th centuries, with their
Irish Americans
…Catholic-Protestant intermarriage remained uncommon in the United States in the 19th century. Historians have characterized the etymology of the term "Scotch-Irish" as obscure. The term itself is misleading and confusing to the extent that even its usage by authors in historic works of literature about the…
An example, showing the usage of Scotch as an adjective, in the 4th edition of Encyclopædia Britannica, Edinburgh, Scotland (1800), and modernized to Scottish in the 7th edition (1829).
Scotch-Irish-American boy in Hawaii, 1909