1860 census, Wilson, Pope, Arkansas Witheral a Wilson 43TN Mary A Wilson 24TN Robert D Wilson 16AR Martha T Wilson 4AR John H Wilson 1AR Lucy I Shetby 17TN
WILSON, WHITED A." 30 CONWAY "PRINCE, MARY A." 20 CONWAY 29 Jun. 1854 A/034 34 Is this his 3rd wife?
1850 census, Welborn, Conway, Arkansas Alum Wilson 13AR Cala Donia Wilson 11 TN she's a Bridges Daniel Wilson 15TN James Wilson 16AR Mary Wilson 11 TN she's a Bridges Melina Wilson 5 Melinda Wilson 36 Robert Wilson 6 W A Wilson 35 William Wilson 9he's a Bridges
I think Melinda was the 2nd wife.
As for Mary/Caledonia, Mary may have died and then Mr. Raley married Caledonia. That was very common.