User blog:ThrownawayCoffeeMug/I'm stuck between names I need someone's opinion

So I'm stuck between some names that I love that I want to use for my name. I already have my first name chosen,but the middle name(s) is where I'm stuck. My first name is Oísin, pronounced similar to 'ocean'. I just don't know what sounds more natural or flowing with my first name out of these middle names: Moss, Ilithyia, Loki, Thatch, and Fenyx. If I paired two together, I like the combos Thatch and Fenyx, Loki and Moss, and Moss and Ilithyia.

But what sounds better? I need some outside opinions as they all sound nice to me.