Using middle name as name.

So when we named our son, we just picked the first name that we both agreed on since we couldn't agree on anything.  But after having him we noticed that it's maybe thee most popular name for a boy. 
Liam.  When he was born and before I'd never heard of the name and beside a few celebrities. But now it's everywhere, his middle name is Roane, and I've thought about that being his nickname since Liam besides lee has no nicknames.
So what do you think? Could we use Roane as his nickname? Or just keep it Liam? 

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