You'll have to send for the original to see the true surname KY MARRIAGES 1846 Panum BLAKENSHIP - Manda WILTON, Greenup Co KY
The names are really butchered.... 1850 Greenup Co KY BLANKENSHIP Farm 30 KY Amana 23 KY Sarah 1 KY******
1860 United States Federal Census about Parrun Blankenship Name: Parrun Blankenship Age in 1860: 38 Birth Year: abt 1822 Birthplace: Kentucky Home in 1860: Tennessee, McDonough, Illinois Gender: Male Post Office: Fountain Green Value of real estate: View Image Household Members: Name Age Parrun Blankenship 38 Amanda Blankenship 27 Sarah Blankenship 11 John Blankenship 10 Julia Blankenship 9 Richard Blankenship 7 Adline Blankenship 5 George Blankenship 3 Caroline Blankenship 1 Edmund Blankenship 1/12
It doesn't look like he served CW, and I'm guessing he would've been Confederate.
You'll have to check with Schuyler Co MO for a will/probate record. Some categories [deeds/wills] are not online. Unless his death was big news, I doubt there would be an obit, and too early for a death cert.