That's not a Tia! (moonfire spoilers)

[Eloah]

I hate to burst your bubble (particularly as I was also pretty intrigued by the idea of the document as you originally described it), but this is just one person's speculation - and not very accurate.

The original poster even says "many of them don't have the same appearance that they did in the old days", and proposes it's because of using fantasias... when the very simple explanation is that they're not the 1.0 retainers at all, just completely separate characters who've also had their names drawn from the pool of NPC name options for that race.

Several of the characters listed don't make any sense to have been working as retainers five years ago - and it's pointed out in the comments on the original page. Ishgardian nobles? Gegeruju? That snobby Sharlayan Lalafell from the Eureka questline? And several others who would have been elsewhere and doing other things at that time.

I think the point of the document was somewhat missed. It's obvious its fan-made, so not everything is going to be 100% cannon or accurate. But, it's a player made speculation sheet based on familiar NPCs that look as though they appeared in 1.0 and 2.0+. We know for a fact that 1.0 NPCs have returned and have different roles than what they were in 1.0. Some even being event specific like Masha Mhakaracca and Damielliot. This sheet is just a compilation of that. True certain ones seem odd and out of place. M'naago being one. But ones like the more recent Sanana make sense (think Papalymo if her appearance confuses you); seeing as how all of the names are supposed to be former retainers. The thing to remember is that both in game and now irl 5 years have past, and memories and appearances change; specifically since the game was reworked; Damielliot doesn't look like his 1.0 self since he has aged, though shouldn't he look more like Alphinaud and Alisaie? It's mostly a nod for 1.0 players who may recall them and be intrigued by what they are doing now.

SE does like to retcon things, or add new info to varying degrees, like the Halicarnassus one. But, i'd like to think NPCs are more strict and well regulated. But even that is speculation. This is all an easter egg, regardless of it being the same individual or the same name.