What does Nikolaos mean?
Greek Nikolaos (Nicholas), from 'nike' ('victory') and 'laos' ('people'), i.e. 'victory of the people'. Borne by Saint Nicholas.
What does Alexandros mean?
Greek Alexandros, from 'alexo' ('to defend, help') and 'aner/andros' ('man'), i.e. 'defender of men/people'. Borne by Alexander the Great.