Problem when deleting with php in a mysqli database

I am making a form in which you can already save perfectly in the mysqli database, and I already get the data in an html. Now what I want is to erase with a button.

The thing is that it deletes, but always the last record, and not which one I select from the list independently. If I select the first or the second one, I always delete the last one, and I want to see what's wrong.

Here is the code from where I get the list, and also has the delete button.

<?php


        $consultabla = mysqli_query($conexion, "SELECT * from 001_agendacentral") or die("Error al leer Agenda");
            while ($extraido = mysqli_fetch_assoc($consultabla)) {



          echo '<tr>
                <td>'.$extraido['nombre'].'</td>
                <td>'.$extraido['departamento'].'</td>
                <td>'.$extraido['puesto'].'</td>
                <td>'.$extraido['correo'].'</td>
                <td>'.$extraido['telefono'].'</td>
                <td>
                  <form action="admdelete.php?id='.$extraido['id'].'" method="POST">
                    <input name="id" type="hidden" value="' . $extraido['id'].'"/>
                <input type="submit" class="btn btn-warning" value="Borrar"/></td>
                </tr>';
                }

                mysqli_close($conexion);
                 ?>

Here is the file that performs the deletion procedure.

<?php
   require_once('../connect.php');

   $conexion = mysqli_connect($host,$user,$pass,$db) or die ("Error al conectar");
     $conexion->set_charset("utf8");

    $id = $_REQUEST['id'];
    echo $id;
       //Borrado de tabla con el Campo Nombre
      $borrar = "DELETE from 001_agendacentral where nombre='$id'" or die("Error al Borrar");

       $resultado = mysqli_query($conexion, $borrar) or die ("Error al Borrar");

     if ($resultado) {

mysqli_close($conexion);
echo "Borrado Correctamente";
# code...
}


?>

Already the id column exists in the database. In case you wonder why I'm not showing it, it's not necessary.