1.) Because he holds a title of nobility, Esquire, Attorney, Lawyer.
The Title of Nobility Clause is a provision in Article I, Section 9, Clause 8 of the United States Constitution, that not only forbids the United States from granting titles of nobility, but restricts members of the government from receiving gifts from foreign states without the consent of the United States Congress.
2.) William Weld is a honorary member of the Council on Foreign Relations.: http://www.cfr.org/about/membership/roster.html?letter=W