Compound names, e.g., William Least Heat Moon, Garcia y Menendez, Finzi-Contini, George Gordon Lord Byron, von Kleist, etc. Pseudonyms, e.g., Mark Twain, Samuel Clemens. Full vs. shortened name, e.g., IBM vs. International Business Machines. Parent vs., subsidiary companies. United States companies operating abroad, and foreign companies operating in the U.S., may use different names for parent companies and subsidiaries.
Name changes over time.
Given the number of mergers, buy-outs, bankruptcies, etc., one should search by current and appropriate historical corporate names. These can be quite tricky and elusive. Double check the exact name of a committee, a congress, an executive branch, etc. Name changes over time. Works published in one country may have a different title when published in another country.