Yisrael ben Shmuel of Shklov
One of the youngest of the disciples of the Vilna Goan, he moved to Palestine, where he first became rabbi of Safed and then Jerusalem. He nevertheless traveled to Europe as an emissary for the Jews living in Palestine..
Works on Sefaria
Letter to the Ten Lost Tribes of Israel
Meir ben Shmuel
Rabbeinu Yonah of Gerondi
Shlomo Ephraim ben Aaron Luntschitz