Sharon, See my other post here about the history. To answer your question about the spelling. The Pinaire's came from France and still have family there near LeNans France. The name was not origionally spelled with an "s" in it.
They came by ship to New Orleans, La and from there up the Missippi and Ohio Rivers and setteled in Harrison County near a small community named Frenchtown.
The information I have is that all Pinaire's in US are descendants of this family. There were 6 sons and 3 daughters. I am a descendant of Theodore who was the 4th son and I have up to date information about all of his descendants. If you want I could probably give you the name of someone who has more general information concerning the others from this family. E-mail me if you desire more information.
Linda Fisher, New Albany, In. email@example.com