Preceptor (noun)

A teacher or tutor, especially one who teaches or instructs in a private or informal setting.

Origin:

Late middle english: from latin praeceptor, from praecep(t)- "set before" (from prae "before" + cap(i) "take").

Examples:

1. He was a preceptor to many successful students.
2. She was a preceptor for a young prince.
3. The preceptor was a mentor and guide.
4. The preceptor was well respected for his teaching methods.
5. The preceptor had a great impact on his student's lives.