It was also revealed that Canadian Prime Minister Justin Trudeau's top fundraiser and senior advisor Stephen Bronfman, heir to the Seagram fortune, moved some $60 million to offshore tax havens with ex-senator Leo Kolber.
The findings have emerged as part of the Paradise Papers released by the US-based (ICIJ), which was behind the Panama Papers made public last year.
There is no suggestion that Ross, Bronfman or the queen's private estate acted illegally.
But Ross's ties to Russian entities raise questions over potential conflicts of interest, and whether they undermine Washington's sanctions on Moscow.
The revelations about Bronfman could spell trouble for Trudeau, who was elected two years ago riding on the coattails of promises to reduce economic inequality and tax avoidance.
In the case of Queen Elizabeth's private estate, critics may question whether it is appropriate for the British head of state to invest in offshore tax havens.
