Yes, this seems to be the same family! James and Nancy were married on Oct. 11, 1838 in Madison, Jefferson Co, IN. They later moved to Iowa. Henry did move to Oklahoma and one of his sons married my grandmother.
Henry married Laura (Lora) Lambert in Missouri, his son Franklin Snider married Odie Lee White in Oklahoma. Please do contact me, as I have cousins that are also researching this line.