James Johnston, Caty, and children, George, Valentine, Catherine, Amelia and James Jr. moved to Ohio to expand the merchandizing business, establishing Johnston’s Station in Muskingum County at Wakatomika Creek. Their daughter, Ann (Nancy) had married her cousin, William Robinson, Jr and stayed on in Clarksville with the Robinson family.
Ann Johnston, widow of William Robinson, Jr. married Muskingum County Supreme Court Clerk, Abel Lewis in 1805, and Valentine Johnston married his cousin Rebecca Robinson in 1806.
https://www.findagrave.com/memorial/184399924/catherine-johnston