Atra du evarinya ono varda.
But yes, Ghetsis was with N since he was a toddler. Ghetsis even references that N is human, though in a roundabout way. The theory of N being a descendant of the old kings is a really cool theory, though I think they took the idea from the Manga, the part about the Children of Viridian Forest. They show N in some woods, but they never say which woods he was in, only that he was ridiculed about his ability from an early age. Children of Viridian Forest were too. Two are still somewhat feared Manga wise.
Ah, true that. I remember reading about the Children of Viridian Forest in the manga. N must be one of those Children then. Kinda makes sense.