If you want to know the origin of that name, that I can help you with. JewishGen and Bessarabia SIG are not going to answer that question, but "A Dictionary of Jewish Surnames from the Russian Empire" by Alexander Beider will tell you a lot of the name. The name you asked is Русаков - RUSAKOV. You can find a burial record in Kishinev cemetery for RUSAKIV, Naum.
The name is of Toponymic category (from the names of towns/villages): village of Rusaki, Vitebsk district or Gorky district or from village Rusakovo (Drissa district or Polotsk district. The name also might be of Personal characteristics from Russian word Rusij - blond.
All the best, Yefim Kogan JewishGen Bessarabia SIG Leader and Coordinator
Moderator note: to avoid any confusion and to prevent moderators from receiving questions on nomenclature, there is no longer a Bessarabia SIG, it is now called Bessarabia Research Division
