According to Montgomery County marriage records, a Barbara Arnold married a John Minick on Dec 19, 1839. I suspect it is this Barbara, since in 1850 there is a Susanna Minick, listed as age 12, living with Barbara's widowed mother and siblings. Also Lindsay Brien's Miami Valley Genealogies, Vol. 4, p. 92, in an article on the Minnich family, says that John Minnich married Barbara Arnold, b. Sept. 5, 1819; daughter of John and Barbara Arnold." But Lester Binnie in The German Baptist Arnolds lists Barbara dau. of John & Barbara as b. 21 Sep 1819 and as marrying a Troxel, first name unknown. I am going on Lindsay Brien's identification for now.

Stone in Landis Cem. says "Barbara wife of John Minnich, 1819-1898"