According to EuroMaiden Press at http://bit.ly/2tbqm9k:
A huge database of people born in the territory of contemporary Ukraine between 1650 and 1920 became available online this week. Its opening crowned the four-year efforts of activists to digitize, systematize, and assemble countless entries from historical documents—but is not the final point of the project.
The database includes 2.56 mn people and is expected to reach 4 to 5 mn in 2019. The access to its contents is and will remain free of charge. The sources of data are manifold: birth registers, fiscal and parish censuses, lists of nobility, voters, the military, and victims of repressions, address directories, and other documents produced under the Tsardom of Muscovy, Russian and Habsburg Empires, Poland and the Soviet Union. A Roman-letter version of the data index is reportedly to be enabled in the coming months.