It's growing on me too. If I were to use it it would be as an indirect way of honouring my father (he loves mountains and mountain walking, in particular the Munros :) )
I like:
Adrian MunroKeiran Munro (though I prefer the spelling
Ciaran)
Nathaniel MunroTristan Munro (my favourite)
Sullivan Munro is a bit surname-y and I find it very mountain-y because of the mountain Suilven in Sutherland (which isn't even a munro).