如何通过HTACCESS将多个备用URL重定向到父URL

I Have this Parent url for my website

 https://www.xyz.de

And there are alternate URLs too from where my site can be accessed like the followings:

Alternate URL 1: http://xyz.de/index.php
Alternate URL 2: https://www.xyz-zvb.de/index.php
Alternate URL 3: http://www.xyz-zvb.de/index.php
Alternate URL 4: http://xyz-zvb.de/index.php 
Alternate URL 5: www.xyz-zvb.de/index.php

But Now I want to redirect all these URLs to the main parent site URL every time User access the site with alternate website url it will redirect to the parent main URL.

I have tried like follows but in this case only one URL can be redirected and i think it is not a proffered way to do so.

Redirect 301 /contact.php http://example.com/contact-us.php

any help regarding this task?

Use it:

# Permanent URL redirect
Redirect 301 /index.php https://www.xyz.de

if xyz-zvb.de or www.xyz-zvb.de

# Permanent URL 
Redirect 301 / https://www.xyz.de

You can use this rule in your site root .htaccess:

RewriteEngine On

RewriteCond %{HTTP_HOST} !^www\. [NC,OR]
RewriteCond %{HTTPS} off [OR]
RewriteCond %{THE_REQUEST} \s/+index\.php[?/\s] [NC]
RewriteRule ^ https://www.xyz.de/ [L,NE,R=301]