Back in 1914 James Connolly wrote Labour in Irish History. It was reviewed in the Socialist Standard, a journal of the Socialist Party of Great Britain, in June 1914 and the reviewer said that Connolly's work 'cuts through the sham superficialities of the struggle between Home Ruler and Ulsterite, Catholic and Protestant'.
In December 1919 the Chicago Tribune also described Sir Edward Carson as an Ulsterite.
Dr H M J Klein wrote A History of Lancaster County in Pennsylvania in 1926 and said: 'It is generally recognized that the first dominant Scotch-Irish settlements in Lancaster county were in its 'Upper End' or northern part, not in the 'Lower End', as the five Scotch-Irish townships of southern Lancaster are sometimes called. The settlement of the aggressive Ulsterites in Lancaster county seated a power which soon became evident in the local government.
Thomas Jefferson Wertenbaker (1879-1966) wrote The Planters of Colonial Virginia, which was published by Oxford University Press and Princeton University Press in 1922. In it he referred to waves of immigration and said, 'The indentured servant differed in no essential from the poor Ulsterite or German who followed him in the Eighteenth century, or the Irishman, the Italian or the Slav in the Nineteenth.'
The word is also used in relation to a resident of Ulster County, New York.