Who are Christina Nelson's parents?

I recently discovered a hint to a 3g-grandmother's family.  Christina Nelson has been one of my brick walls.  Who are Christina's parents and siblings?

 

Irvin and Christina (Nelson) Johnston had 5 children survive to adulthood:  William Alfred, John Wesley, Thomas Franklin, Henry Howard, and Mary Malissa (Mollie).  Christina Nelson was born 7 May 1825 and died in Huntingdon Co., Pennsylvania on 22 Nov 1895.

 

Mollie married William H. Baumgardner on 18 Mar 1879.  Her marriage occurred between the death of her father on 29 Nov 1878 -

 

"Irvin Johnston of the township of West in the county of Huntingdon… To my beloved wife Tiney Johnston, all my household furniture that is now in my house and in my possession, also my horse, carriage and carriage harness, two cows, three young cattle, six heads of hogs and three hundred dollars of money out of the sale of my personal property…Executors will lease my farm on which I now live for the sum of three years after my decease and then put it to sale.  My wife Tena Johnston to remain in the house until the expiration of the lease…bequeth to my wife Tenay Johnston five hundred dollars out of the sale of the farm to be invested in a homestead…I do hereby bequeath to my son Wesley Johnston three hundred dollars…the balance of my money…shall be equally divided between the following names heirs:  Alfred Johnston, Wesley Johnston, Franklin Johnston, Howard Johnston, and Molley Johnston, my five children" - 

 

- and the recording of the completed Executor's report in 1881 -

 

"Irvin Johnston’s five children, as listed, W. A. Johnston, T. F. Johnston, Howard Johnston, J. Wesley Johnston, and Mary M. Baumgardner."

 

 

 Mollie and William H. Baumgardner lived in Fulton Co, PA and had 3 children:  Maude, Harry, and Paul.

 

Through an online digital newspaper website, I found the following article from the Bedford Gazette, Bedford, PA; Friday, Jan. 3, 1903:

 

 The Hon. and Mrs. John Nelson, of Cessna, celebrated their fiftieth wedding anniversary with a party of Tuesday, December 30, 1902.  Judge Nelson was born at Spring Mill, Centre Co., Pennsylvania on June 9, 1821.  His father was a tailor.  In 1840 Judge Nelson moved to Neff's Mills, Huntingdon Co.

Among the guests celebrating was "Mrs. Mollie Baumgardner, Wells Tannery, niece to Judge Nelson, and her daughter Maud".

 

Just might need to visit my alma mater for a few days to research in Centre Co, Pennsylvania!