Don't know about relationships, but:
"Nicholas Rockefeller is a partner in the technology group of the law firm of Perkins Coie, and managing director of Rockvest Development Group, an investment company with multinational interests in banking and venture capital. He previously was at the law firm of Troop, Steuber, Pasich, Reddick & Tobey. He is chairman of the Los Angeles Committee on Foreign Relations, serves on the boards of several public and private corporations and is active with a number of nonprofit organizations, including his alma mater, Yale University. Mr. Rockefeller is a frequent lecturer on issues relating to venture capital, the world economy, e-commerce and technology ventures. A participant in the World Economic Forum, he is a member of the Council on Foreign Relations and the International Institute for Strategic Studies."
http://www.pacificcouncil.org/interior. ... emID=12870
Sounds like a Rockefeller Rockefeller resume. I have a friend who knows family trees. I'll ask what he knows...