Alexander is a given name that can refer to:
- Alexander Pope, a Muggle poet
- Alexander William, a Gryffindor student
- Christian Alexander, a Gryffindor student
Behind the scenes
Real-world individuals with the given name Alexander include:
- Alexander Watson, Emma Watson's brother who plays an extra in the first two Harry Potter films
- Eva Alexander, portrayed a waitress in Harry Potter and the Deathly Hallows: Part 1