How interesting! You relate to both lines also. The Plaisance line comes in through my late husband. His maternal grandfather was a Sanchez and his maternal grandmother was a Plaisance.
Their names were Andre Sanchez m Theodora Ella Plaisance.One of their children was Milda Sanchez who married Anthony Templet, Sr.. They were from the Donaldsonville area.
I wonder if we could be cousins through marriage?
Would you happen to know how I could order "The Canary Islanders of Louisiana?" It seems I've heard of it somewhere.