public function getHtml()
   {

        $_orders = $this->order->getOrders();
        foreach ($_orders as $order){
            $itemName = '';
            $itemQty = '';
            $customerName = '';
            $billingAddress = '';
            $OrderId = $order->getEntityId();
            $customerName= $order->getCustomerName();
            $billingAddress = $order->getBillingAddress();
            $OrderItems = $order->getAllItems();
        foreach ($OrderItems as $item) {
          $itemQty.= $item->getQtyOrdered().'<br />';
          $itemName.= $item->getName().'<br />';
        }

                echo $OrderId;
                echo $customerName;
                echo $itemName;
                echo $itemQty
                echo $billingAddress;

}

$billingAddress = $order->getBillingAddress();

$billingAddress = $order->getBillingAddress()->getStreet();

use MagentoSalesModelOrderAddressRenderer;

/**
 * Class Address
 */
class NameClass
{
    protected $addressRenderer;

    public function __construct(
        ................

        Renderer $addressRenderer,

        ................
    ) {
        $this->addressRenderer = $addressRenderer;
    }

     public function getHtml()
     {
        $_orders = $this->order->getOrders();
        foreach ($_orders as $order){
            $itemName = '';
            $itemQty = '';
            $customerName = '';
            $billingAddress = '';
            $OrderId = $order->getEntityId();
            $customerName= $order->getCustomerName();
            $billingAddress = $order->getBillingAddress();
            $billingAddressHtml = $this->addressRenderer->format($billingAddress, 'html');
            $OrderItems = $order->getAllItems();
            foreach ($OrderItems as $item) {
              $itemQty.= $item->getQtyOrdered().'<br />';
              $itemName.= $item->getName().'<br />';
            }

            echo $OrderId;
            echo $customerName;
            echo $itemName;
            echo $itemQty
            echo $billingAddress;

        }
    }

}