Jean de Poltrot (c. 1537-1563), sieur de Méré or Mérey, was a nobleman of Angoumois, who murdered Francis, Duke of Guise.
He was born 11 December 1724 in the Castle of Baillet in the town of Bayers, then in the ancient Province of Angoumois, now part of the Department of Charente.
Its common name refers to Angoumois, the pre-revolutionary province of France from which it was first scientifically described by G.-A. Olivier in 1789.