.htaccess:
# From www to non-www classicalmusicrookies.com
#RewriteEngine On
#RewriteBase /
#RewriteCond %{HTTP_HOST} ^www.classicalmusicrookies.com$ [NC]
#RewriteRule ^(.*)$ http://classicalmusicrookies.com/$1 [R=301,L]

#From www to non-www klassiekemuziek.tv
#RewriteEngine On
#RewriteBase /
#RewriteCond %{HTTP_HOST} ^www.klassiekemuziek.tv$ [NC]
#RewriteRule ^(.*)$ http://klassiekemuziek.tv/$1 [R=301,L]

#From www to non-www timkranen.com
#RewriteEngine On
#RewriteBase /
#RewriteCond %{HTTP_HOST} ^www.timkranen.com$ [NC]
#RewriteRule ^(.*)$ http://timkranen.com/ [R=301,L]

#From www to non-www toonverbeek.com
RewriteEngine on
RewriteBase /
RewriteCond %{HTTP_HOST} ^www.toonverbeek.com$ [NC]
RewriteRule ^(.*)$ http://toonverbeek.com$1 [R=301,L]

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

virtual hosts(apache2/sites-available)
<VirtualHost *:80>
DocumentRoot /var/www/classicalmusicrookies.com
ServerName klassiekemuziek.tv
ServerAlias www.klassiekemuziek.tv
</VirtualHost>

and

<VirtualHost *:80>
DocumentRoot /var/www/timkranen.com
ServerName timkranen.com
ServerAlias www.timkranen.com
</VirtualHost>