The patron saint of Ireland is St. Padraig, which has a D in the name. In English, the name is St. Patrick, which is where the T’s come from.
According to a new survey, 49% of Americans go with the T version, 29% go with the D version, and the rest aren’t sure.
People with Irish heritage are more likely to use the D version, which makes sense: the D version is the original, authentic Irish abbreviation.