I am sorry I haven't noticed your message until now, especially as I see no one ever replied to your post. I have been studying the Lanius family that was settled in Botetourt County, VA and found that several of their family members moved from there to Washington County, Missouri. That would mainly be from their son, Daniel Lanius. It looks like some of Daniel's children stayed in Missouri, while some moved on to Texas.
It can be so hard to dig into your family if your parents were not able to share any names or dates with you as you were growing up. Sometimes you can find a father's and mother's name on a birth certificate. Maybe you need to dig into your grandfather's birth certificate to see how far back you can get with the Lanius name.