PHP - Nombre duplicados

$saldo=array(array("12344300","Bill Williamson","0","Soria",rand(2000,10000)),

    array("74987564","Pedro Martinez","0","Andorra",rand(2000,10000)),

    array("25069823","Pedro Martinez","0","Madrid",rand(2000,10000)),

    array("98564412","Gonzalo Crespo","0","Burgos",rand(2000,10000)),

    array("78564230","John Marston","0","Madrid",rand(2000,10000)));

$dup = [];

$len = count($saldo);

for ($i=0; $i < $len; $i++) {

   $count=1

   for ($j=$i+1; $j < $len; $j++) {

       if ($saldo[$i][1] == $saldo[$j][1]) {

	      $count++;

	   }

   }

   if ($count > 1) {

      $dup[] = $saldo[$i];

   }

}

for($i=0, $t=count($saldo); $i<$t; $i++){

      for($j=0; $j<$t; $j++){

            if($i!=$j && $saldo[$i][1]==$saldo[$j][1]){

                  echo "El elemento [".$i."] ".$saldo[$i][1]." se repite en [".$j."] ".$saldo[$j][1]."<br />";

            }

      }

}

// El elemento [1] Pedro Martinez se repite en [2] Pedro Martinez

// El elemento [2] Pedro Martinez se repite en [1] Pedro Martinez