What makes you say it's a Russian stick? Is it red & white & blue & white with "Mockba" printed on it? If so, it might be a promotional stick from McDonalds back in the 1990s.
John Cullen wore #19 for Toronto from 1992-1994. He wore 11 & 15 with Hartford & Pittsburgh. Jocelyn Lemieux also never played with Cullen on the Whalers. If that is his signature, the J is really weird!!
The big challenge here is: This isn't a Toronto team-signed stick. #23 for T.O. back then was Todd Gill.
If the second signature is #9, that's more telling that it isn't a Hartford stick. They retired #9 (Gordie!).
Also, during this time period for the Whalers, #8 (assuming the 4th sig is putting #8 down) was worn by Geoff Sanderson & Mark Greig.
Good luck on the hunt!!