Until 2011, the sole source of information regarding the founding of Kolonja Izaaka was the report given by Salomon Salit in his 1934 book,  Kolonja Izaaka: Wies Powiatu Sokolskiego. The information in Pinkas Hakehillot seems also to derive exclusively from Salit.

In 2010 archivists in Grodno came upon the 1853 Supplemental Revision List for Kolonja Izaaka. In 2011, researchers from the Belarus Jewish Heritage Research Group (JHRG) undertook copying out and translating the list at the request of Kolonja Izaaka descendant Marilyn Cohon. The list gives new details, corroborates many of Salit's, and provides some new names and facts altogether. It also reveals that although the colony was founded on paper in 1849, it was not actually inhabited until 1851, the year most of the families in the List report moving there. A few families came later and they were added on to the Revision List subsequently. According to JHRG, archival policies in Grodno prevent the actual list from being copied or scanned, so we are reliant on JHRG's careful handiwork here.