During the period c1700-c1800 there are at least three "Christopher Houston" (and varaints of the name) living in the Delaware-Pennsylvania-Maryland border area.
1.Christopher Houston (c1676-c1726)
2.Christopher Huston (c1720-1784) was apparently born in Lancaster County or perhaps Old Chester PA and migrated about 1745 to Cumberland County, PA
3.Christopher Houston (c1743-1837) was apparently born in the Old Chester County (PA) area and located to Iredell Co. NC c1765.
4. Christopher Huston (?-?) was the eldest (?)son of Christopher Huston (c1720-1784) of Cumberland Co., PA