Unfortunately, it does not look to me like it is a match. John Thornley Murdock was first married in 1826.To be the father of the John in the 1860 Platte County, MO census, my John would have had to have been married in 1823.While it is possible that he could have married in 1823 (he would have been 19) and this unknown wife could have died in childbirth or from something that would have enabled my John to marry again in 1826 in Harrison County, KY - it is a stretch.The next issue would be his birth place.My John was born in 1804 in Westmoreland County, VA -why would he have gone to Ireland to have a baby?
Where was the John in the 1860 census married?
My Murdocks were in Virginia and Maryland in the early 1700s and possibly the late 1600s.They were merchants and planters and it is conceivable that business could have taken your John to Ireland.
There are Eleanors, and Marys and Williams and Johns throughout my family tree.It would be nice to make a connection, but I bet it would be difficult.Did you find other Murdocks in the Platte County, MO indices in 1860 and other years?