About Meir Walsch, מאיר ואלש
"Saul Wahl" by Dr. Neil Rosenstein.
Chapter 8, page 265.
Derivation of the name "Walsch"
Saul Wahl's daugher, Pesia, married a certain Meir, who became known as Meir Wahl's [that is, "Meir (son-in-law) of Wahl"] or Walsch.