My name is also Mark McKinniss.I live in Southern California, and yes, I have a large number of relatives in Ohio too.My great-grandfather, C.C. McKinniss of Wellston, Ohio, and others of his generation put together a family history which included information about our earliest American ancestor, Charles McKinniss of Scotland.Charles McKinniss is supposed to have come to North America with General Braddock's troops in 1755.He fought in the French and Indian Wars and was wounded through the side and thigh in the battle of Fort Duquesne.(See "Last of the Mohicans" for an excellent rendition of such combat.)
Other American pioneers like George Washington and Daniel Boone were also present at the battle, which was a devastating defeat for the British.
Charles McKinniss was supposedly with the Grenadiers, and the family history suggests he received a battlefield commission (no doubt many officers were killed in the battle and more were needed).His name does not appear in existing rolls of Braddock's soldiers, but unfortunately such records are not terribly reliable.
He settled in Pennsylvania and died there in Butler County.His sons Charles and Robert traveled to Ohio, where they settled.Lots of us still there!
I haven't read all the postings to this site, although from the titles, most of what I wrote above is generally known to McKinnisses everywhere.I'd like to hear from anyone interested in our family; I have a lot of material which I got from my Uncle Paul McKinniss in Wellston, which I'd be happy to share.(Later, that is.I'm in law school and finals are in two weeks.)