Shalom friends, 

This page from the book "le-korot ir Rassein Ve-Rabaneha" mentions a list of people who were the brothers-in-law of somebody. 

I would be very grateful for a clarification of whom. Are these people brothers in law of Yehezkel Katzenellenbogen, Ze'ev Wolf, or Shmuel Chassid? 

Thank you very much, 

Yoav Aran
London