No, ‘everyone’ is not considered a proper noun. It is classified as a common noun.
A proper noun refers to a specific name of a person, place, or organization, and it is always capitalized. Examples of proper nouns include ‘Alice,’ ‘New York,’ and ‘Microsoft.’ On the other hand, ‘everyone’ is a general term that refers to all people in a group, without specifying individual names. Common nouns, such as ‘everyone,’ are not capitalized unless they begin a sentence.