What does Andrew mean?
Andrew comes from the Greek Andreas, “manly, brave,” from anēr, “man.” Andrew was the first-called of the apostles and is the patron saint of Scotland.
What does Alexander mean?
From Greek 'alexein' (to defend, protect) and 'aner/andros' (man), so 'defender/protector of men'. Note this is strictly 'defender' rather than 'warrior', though its martial fame comes from Alexander the Great.