I found a lil rabbit hole in that IRS criminal investigation of Hunter and James Biden, that possibly links them to the Royal families of Sweden, Norway and the Netherlands:

Who is ERIC SCHWERIN?

1) He appears last on the list of 4 who's bank account records are subpoenad,

4) Here's his bio from his appointment as Senior Policy Advisor... it indicates he has connections both to Czechoslovakia and as Outreach Coordinator for the China Trade Relations Working Group in 2000. He appears to have started working with the Bidens straight after this appointment (planned?):

Eric D. Schwerin is Founding Partner and Managing Director at Rosemont Seneca Partners, LLC, positions he has held since 2008. He has also been President of RSP Investments, LLC since 2013. Previously, Mr. Schwerin was Partner at Oldaker, Biden & Belair, LLP from 2002 to 2008. He worked in various roles at the Department of Commerce, including Senior Policy Advisor to the Secretary for International Trade in the Office of Policy and Strategic Planning from 1999 to 2002, and International