My young nephew signs his messages “Your’s Nephew, Lester”. Shouldn’t it be “Your” & if so, why?

You are right, it should be YOUR nephew.

The reason is as follows:

Yours (not your’s) is a pronoun used to indicate the one or ones belonging to you: The larger boots are yours.

Your is a form of the possessive case of “you” used as an attributive adjective: Your jacket is in that closet.

Your nephew is a product of the “educational” “system.” That means he’s uneducated.

“Your” is an adjective. It requires a noun. “Your’s” is sort of like a pronoun. Thus, while “Your house is your’s,” makes sense to the ear, “Your’s house is your,” does not.

Your’s truly, or truly your’s makes sense in that context.

In times past, with syntax like that he would be lucky to land a job as a farm hand. Today, hardly anybody in the United States speaks proper English. But that’s because we’ve forced our teachers to show students how to properly mark the correct box on some standardized test rather than how to read, write, to research, to absorb information, and to make intelligent decisions based on that information.

Maybe we ought to be grateful hat he doesn’t sign them “You’res” or “urs” or “urz”.

I assume your nephew is adding the apostrophe + “s” because he knows this is how we make most ordinary nouns possessive. However, “your” is already possessive (a possessive pronoun) and does not need this ending.

Most of the people got it right, but I wanted to add one point. “Your’s” is not a word. The possesive form of a pronoun NEVER is formed with an apostrophe. Examples: hers, his, theirs, YOURS. “Is this yours?”- no apostrophe.

Yours is possessive and is only used if the thing possessed is not named: “Whose book is this? Is it yours?”

It should be “Your Nephew.”

I think he had meant it as

Yours

Nephew Lester.

Alternatively, it can be

Your nephew,

Lester.

Because “your’s” denotes a plural and it the ‘s shows possession… so he is showing that he possess “nephew”

It should be “Your Nephew”…

Your is the genitive case of you and no apostrophe s is required.