I just ran across several references to MCCUEN in Fayette Co., PA. The county seat is Uniontown. The county is located on the Monongahela River SW of Pittsburg, PA. People from Hunterdon Co., NJ were early settlers according to early histories NJ.
From "Fayette County Newspaper Extracts 1805 - 1854" by Jean Rentmeister, C.G.R.S. 1981, page 10:1851, 6 Nov.
On Thursday, the 30th Ult. by Rev Wm. Brownfield, Mr James McBurney, and Miss Eliza Jane, daughter of John MCCUEN, all of this place [Uniontown, PA]
Page 14: 25 March, 1852 Married:
On Tuesday, 15th inst. by Rev. Ross Stevenson, Mr John Bolton and Miss Martha M'CUEN all of the vicinity of Connellsville.
from "Fayette Co. Gleanings" compiled by Kathryn Miller, 1990, Houston, TX Page 61:
MCCUEN, Mabel S. buried in Addison Cemetery, Addison, PA. 1891 - 1981.
James and Samuel MCQUOWNwere on the tax list for Franklin Twp. in 1787.
Andrew MCEWIN was on the tax list for Wharton Twp. in 1788.
John MCEWEN was on the tax list for Luzerne Twp. in 1788.
MCKUNE, Andrew, James, James Sr., and Samuel are on the tax list for Franklin Twp for 1796.
Hope this helps, this is not my family so I have no more. Good luck, Bruce