Feanor wrote: Alaran associated with Larani has has three small moons: Avarkiel, Hyvrik and Angcaradina. Larani's Angcaradina, her blood-red mail. Hyvrik, her red and white checkered shield
Kenor has six moons: Hyvrus, T'nor, Kychus, Fressus, Brall, and Cullus. - Var-Hyvrak (Hyvrus) the Illimitable Tome
The planets orbital peroids are no accident being integers to 2 decimal places. Robin obviously attached immense significance to details of the planets and their naming. Nothing about the solar system is natural or by chance.
and the naming also has me scratching my head.
Angbarillius - the sword (constellation)
Angcaradina - Larani's blood-red mail (moon)
Ang - from Middle Earth Elvish "Ang" is Iron which fits both for both Angbarillius and Angcaradina.
Hyvrik - Larani's checkered shield
Hyvrus/Hyvrak - the Illimitable Tome
Also the names of Kenor's other 5 moons.
Middle Earth Tolkien Elvish world roots are widely used in fantasy writing and also common in Harn World. May give clues to other word roots in planet naming like Kenor's moons. That could give a clue to who was naming them and/or to some of their properties.
Angcaradina as a moon makes me guess to iron deposits and red color to the moon (not that it can be seen directly by most).
Mergus the planet farthest out the "Sable Eye" seems to me, despite its large size is probably a barely visible large dark orb do low light reflection etc. and a cold dead world of immense significance as suggested by reference to being named after Bukrai.
Middle Elf word roots - based humor
Mor-goth was the "Black"-"Foe of the World"
(Morgath on Harn is an obvious reference.)
If we instead named Mergus "Morgoth" it could be the "Black"-"Foe World"
(and of course I remember that kind of thing because Feanor renamed "Melkor" as "Morgoth")