What part of the name should be used to refer to someone?

1. How do you use one to refer to a person?
2. Should you address someone as Mr or by first name?
3. Which preposition is used before name of person?

How do you use one to refer to a person?

As a personal pronoun (both subject and object), one can be used to refer to 'people in general'. We often use one in making generalisations, especially in more formal styles. However, if one is used too much, it can make the speaker sound too formal.

Should you address someone as Mr or by first name?

Technically, it's not appropriate to use a person's first name, without permission. The right thing to do is use an honorific (Mr., Ms., Mrs., Dr. ...) until the person says, “Please call me (first name).”

Which preposition is used before name of person?

The preposition form words and their usage: Of: This preposition of possession is usually used for cities, countries, people, and possessive pronouns.