My father's grandmother's surname was Pierre.
She married a Luxemburger named Toeckes (Tackes).
My brother, Jerry Tackes, has kept in touch with some other family members in Wisconsin and Missouri, who MAY have researched back to the time of the
Pierre surname (circa early 1800's), at the French border with Luxemberg.
Try Jerry Tackes at 847-362-2931 (Libertyville, Il)
He does not have an email address to my knowledge.
Good Luck, and keep me informed, as I am wondering also..
Rob Tackes