6 letter animal starts with an e is "ERMINE". An alternative name for the stoat. For more info, click on the link below: http://en.wikipedia.org/wiki/Ermine an enkidna starts with E elephant, eel or eagle
A United States president who served before Richard Nixon whose last name starts with an E would be Dwight D. Eisenhower. There was never a president (before or after Nixon) to have a first name that starts with the letter E.