From our friend at Wikipedia:
https://en.wikipedia.org/wiki/Lunatic#:~:text=The%20term%20%22lunatic%22%20derives%20from%20the%20Latin%20word,has%20been%20interpreted%20as%20a%20reference%20to%20epilepsy.
Thanks for that, Ms. B! God bless ya - how the heck are you doing these days? Is the pain any better?