Steve, Armilda Cox and French Strother were my great-great grandparents. Her years were 1845 - 1922. I'm not sure if she was in Platte County prior to marrying French Strother. I do not know if she is related to your Cox. Pat Shaw wrote on her FindaGrave memorial: "She is the dau of Benoni Cox and Hannah Kavanaugh. Her sisters are Sarah E. Cox mar. Joseph Cox; Martha Ann Cox mar. Benjamin Van Buren Ferril; Mary; Nancy Jane Cox mar. Samuel Jobe Ferril; Suannah Cox mar. John McBride; and Marion M. (Mary) mar. George D. Ferril. Armilda and French had six children." Notice she had multiple siblings who married Ferrils, a prominant family in early Platte County history.