This may not help but I to am looking for the cowan familys from Ar. to Texas. My grandmother was Delia Cowan b. Oct 1882 d. 1965 in Waco Tx.,Her father was John I Cowan at the time of Delia's birth was Salem Ar.,She married Joseph Thomas Redden June 22, 1904 in Belton Texas. My uncle and aunt was Robert and Helen Cowan in Belton Tx. also. Deila's Mother was Mira Fidella "Bell" Moore. They had four children Ira, Joe Thomas,Samuel Wiley,and Lucile. All borned in and around Bell Co. Texas.
Helen and Robert cowan had these children , Robert, J.I.,Pate, Doris,Joseph, and that is about all I can Remember now.
If this helps I have some records that show more about burial and place of marriage info.