My Caplinger/Keplinger line is also from Highland County Ohio. My grandma Beulah Newman Caplinger lived there until her death a few years ago. Until recently, I've only been researching the name as we use it today (ie, Caplinger) but one of my Highland ancestors John Cary Caplinger (b. 1855 OH) also used the name Keplinger in the 1910 census with his wife Rebecca/Rebecka Murphy, so I am now over on this board trying to piece things together.
I would love to hear about the 13 children that you mention as it might tie into my line.