Add username after "Welcome" on the dashboard

This link might help you out.
https://www.wpexplorer.com/custom-wordpress-welcome-message/

Thanks for your answer. Well I don’t want to add a whole new widget.

I already have done that, it works, and just wish to include the user name.

function custom_add_dashboard_widgets() {
    wp_add_dashboard_widget( 'custom_dashboard_welcome', 'Welcome', 'custom_add_welcome_widget' );
}
function custom_add_welcome_widget(){
get_currentuserinfo();
$firstname=$current_user->user_firstname;
?>
Welcome <?php echo $firstname; ?>
<?php }
add_action( 'wp_dashboard_setup', 'custom_add_dashboard_widgets' );

The widget is displayed properly but not the user name.

haha, I just forgot the:
global $current_user;
before get_currentuserinfo();
it works now!