Would be much easier if we knew anything about you. Also, you might as well write here the names you made so we will have an idea of what are you looking for.

pick a name, search youtube to see if its taken for LPs

99% chance it is, then you try another one. rinse repeat

Think of what you like, mash it together like Potatoes (;D) and sometime you'll get a nice name.

For Instance this is how I did it:

I like Watermelon
I like Mexico
and my Nickname is Ace

--> ElMelonAce

Try it. Think what u liek and mash dat.