My grandfather's brother says on his Declaration of
Intention that he arrived in the port of New York on or around Nov 1, 1906 on the ship "Russia" leaving from Libau. I have had no luck finding his ship manifest via Ancestry.com, EllisIsland.org or the Steven Morse search aids based on this information or by his name.
Olive Tree Answer: Hello Bruce - You're in luck because after September 1906, a naturalization Petition had to be verified by authorities to an actual immigration (passenger list) record. So somewhere, there is a petition for your ancestor which will have a verified ship name and date of arrival.
There should also be a Certificate of Arrival (also verified). See NaturalizationRecords.com for help. Choose USA thenhen choose the state of interest and read the specifics for that state. Also, both Footnote.comand Ancestry.com have naturalization records online. Good luck!