I'm also a descendent of Eleanor Riggs and Isaac O'Dell. Their daughter Jenetta Catherine O'Dell and her husband John Calvin Titus were my great-great-great grandparents. I'm online here at Ancestry.com under Beaudoin / Bunch Family Tree. It's a public tree so you are welcome to whatever I have in the way of research. The lines include Riggs, O'Dell, Titus, Williams, Woodard, Bunch and so many more.
I'd love to hear back from you and share information! It's always nice to find new cousins!