In Biber's "Mazkeret Legdolei Ostrov" he has two articles on a Rav
Yisrael of Ostrov and he presumes that they one of the same person. My
great great grandfather, Rav Yisrael of Ostrov made aliya to Tzfat
(Israel) in the first half of the 19th century was most likely one of
the Yisrael which Biber mentions.
Is anyone knowledgeable regarding these Rabbanim mentioned in Biber's
books who can shed more light on these (this ?) Rabbi?
Yoni Ben-Ari, Jerusalem