Rabbi Yehoshua Falk from Kovno

BS"D
I am looking for descendents of Rabbi Yehoshua Falk from Kovno (Lithuania?).
The family split into various branches:
Falk
Broide
Brody
Falk-Broide
Sonnison
My branch is from Moshe Yosef (I assume Falk) and his son: Rabbi Avraham Yitzchok Sonnison (later he took his father in laws name: Braverman)
Supposed to have cousins in New York: Samuelson or Philipson.
All the best,
Raanan