Example using namespaces.

index.php

<?php

use Lib\Eddard as AnotherEddard;

class Eddard {

  public static function whoAmI() {
    return 'It\'s method whoAmI in index.php.';
  }
  
}

require_once 'lib.php';

$edd1 = new Eddard();
echo $edd1::whoAmI() . '<br>';
$edd2 = new AnotherEddard();
echo $edd2::whoAmI();

lib.php

<?php

namespace Lib;

class Eddard {

  public static function whoAmI() {
    return 'It\'s method whoAmI in lib1.php.';
  }
  
}