I'm looking to put a website up online, but as I have several websites, I'd like to use a catchy name that isn't already taken. As long as invoices are paid to my company name, and there's mention of the actual company name within the 'about me' page am I free to use a name of my choosing?

For example if my company was called 'xyz' and I wanted to create a website to promote marketing skills (for example), and called this website 'abc' and refer to 'abc' within the text, apart from being a little confusing, is it legally okay to do? As mentioned above invoices would of course be payable to 'xyz' and mention that the company trades as 'xyz' would be given in an 'about' page.
I would simply like to market a particular part of the business with something a little jazzier sounding than my current business name.