: Anyways, one of Nimrodel's handmaidens, I believe she was called Mithelas or Mitherelas or something like that, hitched up with the local lord, a guy named Imrazor the Numenorean (a name I've never seen explained since Numenor had sunk 2000 years previously and, thanks to Ar Pharazon's nasty ways, I'd figure Numenorean style names would have fallen out of fashion in Gondor).

: Imrahil is a man with a touch of elvish blood, so the closest analog is Aragorn.

: The line in the appendencies that trips folks up reads "There were three unions of the Eldar and the Edain..." not of Elves and Men. Mithrellas was sylvan or Sindarin, not quite at the Eldar level. Gondorians were descendants of Numenoreans who were descendants of the Edain, but nowhere do I see them calling themselves "Edain." They used "Dunedain," Men of the West aka Numenoreans, but hesitated to actually call themselves "Numenoreans," save for the strange case of Imrazor.
: Hopefully, this makes sense.

On the contrary, the descendants of the Numenoreans frequently refer to themselves as such. The names Imrahil and Adrahil (his father) are most likely Numenorean in origin. IMO, the area around Dol Amroth seems to have contained a disproportionately high number of families of Numenorean descent, based on notes given in Unfinished Tales and the description of the soldiers accompanying Imrahil to Minas Tirith"

'And last and proudest, Imrahil, Prince of Dol Amroth, kinsman of the Lord [Denethor], with gilded banners bearing his token of the Ship and the Silver Swan, and a company of knights in full harness riding grey horses; and behind them seven hundreds of men at arms, tall as lords, grey-eyed, dark-haired, singing as they came.'

It may be that Imrazor was called 'the Numenorean' because he maintained a Numenorean-styled court - possibly with Adunaic as the official language - far into the Third Age. From Appendix F:

'But the native speech of the Numenoreans remained for the most part their ancestral Mannish tongue, the Adunaic, and to this in the latter days of their pride their kings and lords returned, abandoning the Elven-speech, save only those few that held still to their ancient friendship with the Eldar. In the years of their power the Numenoreans had maintained many forts and havens upon the western coasts of Middle-earth for the help of their ships; and one of the chief of these was at Pelargir near the Mouths of the Anduin. There Adunaic was spoken, and mingled with many words of the languages of lesser men it became a Common Speech that spread thence along the coasts among all that had dealings with Westernesse.'

'After the Downfall of Numenor, Elendil led the survivors of the Elf-friends back to the North-western shores of Middle-earth. There many already dwelt who were in whole or part of Numenorean blood; but few of them remembered the Elvish speech...'

Also, Aragorn refers to himself as 'the last of the Numenoreans and the latest (last?) King of the Elder Days'. And, in Appendix A there is a note concerning the pride of the heirs of Elendil in their Numenorean ancestry:

'The loss of Umbar was grevious to Gondor, not only because the realm was diminished in the south and its hold upon the Men of Harad was loosened, but because it was there that Ar-Pharazon the Golden, last King of Numenor, had landed and humbled the might of Sauron. Though great evil had come after, even the followers of Elendil remembered with pride the coming of the great host of Ar-Pharazon out of the deeps of the Sea; and on the highest hill of the headland above the Haven they had set a great white pillar as a monument.'