John Mowry lived and presumably died in Pennsylvania. He would have been born in or before the 1780s and he died after 1852 when his will was written. I am not sure if this is the proper ancestor.  The links are tenuous all the way up.

Will of John Mowry
No. 27 Vol 8 Page 37

In the name of God Amen I John Mowry of Jefferson Township Allegheny County, Pennsylvania being of sound memory and understanding to make & publish this my last Will and Testament in the Words and Manner following to Wit:  First I will my Soul to God who gave it and my body to the dust to be buryed in a deacent and Christian manner and such worldly wealth as it has pleased God to intrust me with I will and dispose of the same as follows,  I will to my beloved wife Mary Mowry all my real and personal estate during her life time at to   death of my wife Mary I will all my estate borth real and personal to my son Jacob Mowry his heirs and assigns, on condition that he pay each one of my other children the Legacys hearafter bequeathed to them, viz To my son John Mowry I will two hundred and fifty dollars to my son George Mowry I will fifty dollars in addition to what he has already got, To my daughter Chrissy I will three hundred and fifty dollars, to each one of my other daughters I will two hundred and fifty dollars viz Elizabeth Katherine Rebecca and Mary.  The above legacys to be paid by my son Jacob Mowry and to be paid in the following manner biz one hundred dollars per year commencing with the eldest and one year after the decease of my wife and to pay one hundred per year until each one shall have rec’d one hundred dollars, then commencing with the eldest again until each one shall have rec’d two hundred and fifty dollars, with the exception of my son George and my daughter Chrissy, one hundred dollars of the three hundred and fifty willed to my daughter Chrissy I will to be paid within two years after my decease and the fifty dollars to my son George to be paid in rotation as above mentioned.   (there are 5 handwritten lines that are faded too badly to read)

 this my will and attempt to break it they are to be cut off with five dollars

And I do hereby constitute and appoint my wife Mary Mowry Executrix and my son Jacob Mowry Executor of this my last will and testament revoking all other wills and beaqueaths heretofore made by me  In Witness Whereof, I have hereunto set my hand and seal this 26^th of Feb, 1852

Signature (illegible)

Death

Mowry, John, 1786 - 1858 (Husband of Mary Mowry)

http://genealogytrails.com/penn/allegheny/padeaths_various_records.html

Mary was born in 1780 and died in 1857.

Death

Mowry, Mary, 1780 - 1857 (Wife of John Mowry)

http://genealogytrails.com/penn/allegheny/padeaths_various_records.html