Thomas was born about 1697 in Lyon, Rhone, Rhone-Alpes, France. By 1727 he was living on the "left bank" of New Orleans. And in 1740 he died in N.O.
His wife was Marie Gansoir born 1686 in France.
He immigrated between 1708-1727.
I have no information about the family before him. If anyone has heard mention of a Thomas on their Guichard family tree from about 1700 I'd really appreciate the help.