"Guerrero" is a common last name in Spain.

How did you come to that conclusion? The last name Guerrero predates the 1500s by centuries.

Why would the last name come from him and not the other way?

There's that lovely phenomenon, I can't recall the name, of people that live to their name. Like a cook who's named Jon Cook, a gardener who's named Phil Gardener, you get it.

So this.

"Guerrero" comes from Spanish "guerra", which is cognate to English "war". They both derive from a common proto-Germanic root.

Unofficial history, many times, is simply glorified memory, which is very biased and dangerous.

This fueled quite a lot the hangover of the nationalisms born during the XIX century.

Not only that, he resisted Hernán Cortés' efforts to recruit him for the conquest of Mexico using clever guile and cunning.

Twice he helped in thwarting the Spanish entradas into the part of Yucatán where he lived. By then, he had fully assimilated to Mayan culture.

From the account of Bernal Díaz, he seemed to know what was coming from the clash between the Spanish and the natives.

"More Catholic than the pope," I believe that may also mean, referring not to loyalty but to intolerably unctuous and hypocritical sanctimony.

We do have that expression in this language, and "papist" is one of the old anti-Catholic (anti-Irish, anti-Italian, anti-Latin) slurs that actually survives, however deracinated, to the present.

One example of the sort of such slurs that did not survive is 'mackerel-snapper,' deriving from the pre-Vatican II meat fast observed on Fridays, which is also what first put a fish sandwich on McDonald's menu.

Idk. Anarchy was a very big movement in Spain unlike in the rest of Europe. But its also true that there are some cultural values related to family that are also common in other mediterranean cultures that arent there in northern countries. What I find is being such a social culture, the population itself feels more homogenous in its ideas

I think that distinction belongs to The Word for World is Forest by Ursula K. Le Guin. It's a short read, a bit polemic and not as strong as some of her other work IMO, but it clearly had some impact on the writers of Avatar.

"battle-elf" :D

https://en.wikipedia.org/wiki/Gonzalo_(name)

"Gonzalo Guerrero" is the "Magnus Maximus" of names.