The progenitor of the Kirkpatricks was IVON (pronounced Ewan).
Ivon had been instrumental in expelling the Norse people, in 1200's under king William the lion ,and later his son Alexander II . As a result he was granted lands in Annandale in the area called Kirkpatrick Dumfrieshire. The charter granting the land to Ivon was dated 5th of August, 1232.
The following is an excerpt regarding Ivon from the book "History of Dumfries" by William McDowall; pgs. 36-37:
"Ivon, the first Kirkpatrick of whom we read, may have been a young landless soldier of fortune when Bruce came into the district ; or he may, before that time, have taken by right his surname from one or other of the Dumfriesshire parishes that, as early as the tenth century, bore the name of Kirkpatrick. At all events, we think it probable that he was a dweller in "Estrahannent" when it was first erected into a barony. That Ivon was of good birth and family, may be inferred from the favour shown to him by his feudal superior. Some time about 1160, he received from Bruce, second baron of Annandale, a charter of the fishings of Bleatwood and Tester; and the words, "testibus Ivon," are attached to a deed by which the same nobleman granted the Torduff fishings of the Solway to Abbot Everard and the fraternity of Holm-cultram. At a later period, he obtained the hand of Bruce's daughter, Euphemia, in marriage—an honour which must have been flattering to his pride, and which bound his family to the Brucian interest during the fearful struggle which ensued on the death of Alexander III. ++++
From that monarch's immediate predecessor, Ivon, when a very old man, received a grant of the lands of Closeburn, the charter being dated the 5th of August, 1232."
++++This book states that Ivon married Euphemia, daughter of Robert Bruce -- instead Ivon's grandson, also named Ivon, was the one who married Euphemia.