Contributed by Loretta lynneage(at)house-of-lynn.com
I just searched Google Books for "Rutherford County Tyrone" and found
"Pennsylvania Genealogies; Scotch-Irish and German"
by William Henry Egle, Harrisburg, PA(1884),
which does mention Rutherfords of County Tyrone. Of course, most of the information is about the branch that went to Pennsylvania rather than Canada, but it may be helpful nonetheless. The pages are 561, 562, and 567,and the bit that's most relevant to your branch is on 561. An excerpt from page 561 is as follows. Toward the end of the excerpt, when it talks about Pennsylvania, you will notice some place names that came straight from Ireland ...
"In the year 1689, several brothers, of the Scotch family of Rutherford, joined the army of William III. When he invaded Ireland-were present and fought at the battle of the Boyne. Two of them were company officers, and the third was a Presbyterian clergyman. They all remained on the island, one settling in the county Tyrone, another in the county Down, and the minister in the county Monaghan. Several of the sons of these men emigrated to America during the decade between 1720 and 1730; among them was Thomas Rutherford, the progenitor of the family in Paxtang [Pennsylvania]. As an instance of how family likeness is preserved through ages, it may be here stated that the portrait of David Rutherford, grandfather of Sir Walter Scott, which hangs in the dining hall facing the Tweed at Abbottsford [Scotland], would answer equally well as a portrait of the late Dr. Rutherford, of Harrisburg [Pennsylvania], although the Doctor's ancestor left Scotland two centuries ago. No likeness of Thomas Rutherford is in existence, and the only description of him is a traditionary one, which represents him as a dark-haired, well-built man, about five feet ten inches in height, full of energy and of such business habits as led to financial success. There is a spice of romance connected with his early manhood which may not be uninteresting to the reader. His attachment to Jean Mordah, whom he afterwards married, was reciprocated.
The Mordahs were about to sail for America, and Thomas, fearing he might lose his Jean, proposed and was accepted, but poor Jean was scarcely sixteen and her parents said 'no,' and took her with them across the sea. On the cover of his memorandum book, preserved in the family, Thomas inscribed the legend, 'Enquire for Dennygall [Donegal].' This was the location of the Mordahs in Pennsylvania, and, in the following year, 1729, he appeared in person at thoir door and claimed his Jean. Mr. Mordah, doubtless, still thought the pair too young, and, in order that more time might be gained, required his prospective son in law to be the possessor of a certain sum of money, with which to begin the world, before he would entrust the young lady to his keeping. Thomas, like Jacob of old, was obliged to acquiesce, and took his departure for Philadelphia. When he returned, he was mounted on a good horse and had with him the documents which satisfied the old gentleman's requirements. They were married in 1730, and lived in Donegal until after the death of John Mordah, in 1744, when they removed to Derry, and, in 1755, to Paxtang, where they spent the remainder of their days.
Their house, a two-story log, stood on the site of the present residence of Silas B. Rutherford, at Paxtang station, and was burned down in 1840. The old house standing directly opposite the station was built after Thomas Rutherford's death, about 1783, and the old stone house over the spring was, probably, built before Mr. Rutherford bought the property."
[The following paragraph of the book was transcribed from Rutherford's journal or memorandum book.]
"I. Thomas RUTHERFORD, b. June 24,1707, in parish Derrylousan, county Tyrone, Ireland; d. April 18, 1777, in Paxtang; m., by Rev. James Anderson, September 7, 1730, Jean Mordah, daughter of John and Agnes Mordah, b. April 5, 1712, in the parish of Gorty-Lowery, county Tyrone, Ireland; d. August 10, 1789. They had issue, all born in Donegal. Lancaster county, Pa.*
"*From the old memorandum book referred to, we have the following record, wonderfully complete and satisfactory of its kind. Thomas Rutherford, born the 24th day of June, A. D. 1707; and baptized by the Rev. John McClave, in the Parish of Derry-lousan. county Tyrone, living in Cookstown."
Since the information in the book was taken from Thomas Rutherford's handwritten journal, I believe it is very probable that the final "r" in "Derryloran" was simply misread as an "s." I haven't been able to find any other mention of "Derrylousan" anywhere except one message board at a U.S. genealogy website. Paxtang is in Dauphin County, Pennsylvania.
Notably, it was at Paxtang that the Reformed Presbyterian Church of America was formed about 1773, with two of the founding ministers being from County Tyrone - Rev. Matthew Lind and Rev. John Cuthbertson.