Well, I mean, who uses the name "Terrans" right now in casual conversation? I like it, it's one of those little setting touches that makes the universe a little alien. Of course, I prefer the Spinward Marches to the Rim as a setting for the same reason.
So what percentage of "casual conversation" where you live commonly discusses residents of more than one planet?
When you are only ever speaking about the residents of one planet, the term for residents of that planet in general will almost never be used. Instead, we use species names - humans vs cats, etc.
If humans of terran descent had colonised the rest of our solar system (The Moon, Mars, the Asteroid belt, etc) before contacting the Vilani, the term Terran might have been in common usage to mean people specifically from Earth as against anywhere else in the solar system. In which case they'd need a new term to refer to people from our solar system in general.
Simon Hibbs
Exactly - Terrans vs Martians vs Lunians/Lunars (Loonies/Moonies) vs Belters, etc.
IMTU Terran means a person born on Terra, while Solomani means somebody who is racially and culturally descended from Terrans.
With the qualifier that the Terran Confederation refers to a major inter-system polity governed from Terra, and thus "Terran" refers to any citizen of the TC - even if they are not human! The term "Solomani" only appears in the 3rd Imperium.
Similarly, "Solomani" would refer to any citizen of the polity governed by those who are racially and culturally descended from Terrans (once the term "Solomani" comes into use).
And I do (for the OTU) hold with the theory of:
"The name originated as "Men of Sol" during the "Rule of Man" (2nd Imperium), which then became "Sol's Men" and "Sol-Man", then "Solo-Man" ("The Only Man") as used by the radicals of the "Solomani Movement" to indicate that Vilani etc aren't really men/human, with "Solomani" as the plural term. This then was adopted by the new Sol-based polity, triumphing over its main alternative, the "New Terran Confederation".
However, since my Traveller games are in an alternate history where the Vilani Empire doesn't collapse when the OTU says it did, so there is no 2nd Imperium - that period of time is actually a period of stalemate between the Vilani Imperium and the Terran Confederation, as shown in the map below.
Thus, when the period of economic & political breakdown that Traveller calls "The Long Night"* finally ends, the term "Solomani" never really becomes popular - and the revival of a major Terran-led inter-system polity is given the name "New Terran Confederation", which becomes the "Terran Federation" as the structure evolves away from the 'weak central government with powerful local governments' model of the old TC into a more-strongly-centralized (Federal) government.
* thanks, Poul Anderson, for both the term & concept in your 1950s-60s short stories about the Fall of the Terran Empire.
