Enter each author on a separate line. Put the surname first, then a comma and a space, and then the first name, middle name.
Use the author's full name if known. Be consistent with how author names are entered.
Complex author names:
Smith, Alfred, Jr
Williamson, Stuart, III
de Gaulle, Charles
If the author is a multi-word corporation (Corporate author), put a comma at the end, eg: NSW Board of Studies,
If a corporate author name includes a comma in the name itself, use two commas in place of the first comma, eg: Department of Industry,, Innovation and Science
Leave the Author field blank if the reference has no identifiable author/s
If you cite two or more different authors with the same surname, EndNote will distinguish between them by using the author's initial(s) in the in-text citation
Important - MULTIPLE CITATIONS BY ONE AUTHOR: If you have multiple citations by the same author, Eg. Smith, Philip A. and Smith, P.A., make sure they are entered the same way in your library. If you are inconsistent, EndNote may treat them as different authors, which in some styles may result in citations having initials incorrectly inserted into the in text citation.
See this short video from Curtin University Library (CC BY) on author initials.