In Old English, <i>thou</i> was the singular second person pronoun and <i>ye</i> the plural, but would be used when talking to someone of higher status. From what I understand, the <i>ye</i> evolved into <i>you</i> while <i>thou</i> mostly disappeared, so now we all get to be plural. I’m not sure about third person pronouns though.<p>See <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;T–V_distinction" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;T–V_distinction</a>