Filius
Professor Filius Flitwick was played by Warwick Davis.
Professor Smith's first name is not provided in the question.
Professor Sprout's first name is Pomona
Professor Layton and the Curious Village.
Professor Fiendish's first name in the "Murderous Maths" series is Norman.
When a professor signs their email with only their first name, it is appropriate to address them using their first name in your response.
Quirinus.
Horace
The full name is Sybille Trelawney.
Minerva
It is generally considered respectful to address a professor by their title and last name, such as "Professor Smith," in a classroom setting or during office hours. If a professor explicitly invites students to use their first name, it is appropriate to do so.
In academic settings, it is generally respectful to address your professor by their title and last name, such as "Professor Smith" or "Dr. Johnson." Some professors may prefer to be addressed by their first name, but it is best to follow their preference or the norm of the institution.