Where does the name come from?

I am not sure where the name of this beer comes from.  Is it a homage to the Black Irish or a homage to the colour and style of the beer?  I do know where the Plain Porter part comes from though.  Generally Plain Porter is lower in alcohol then just a Porter.

About the Beer – It poured a nice dark colour with a lovely mocha coloured head.  The aroma was of sweet cocoa, roasted malt and some nuttiness.  The flavour was definitely of roasted coffee mixed with some nut and a slight bit of fruit.  There was a very light feel in the mouth.  I expected a bit more of a robust feel to it.

Would I Drink it Again? – Sure it is an easy drinking beer.