Here's an example from the actual RPG:
House Decados
House Decados is, in current estimation, either the weakest or the second to weakest Royal House. Its ruthless tactics have made it many enemies over the years, but the house persists.
House Decados has seen the crown change hands a number of times. Originally, the Tchaikof line held the throne. Over time, the throne has passed into the hands of the Maleviks, the Romanovs, the Vladislavs, the Ivanoviches, the Aleksandrovs, the Sfillis, and six other extinct dynasties. The Romanov dynasty, always strong, was deposed during the brief reign of Halvor the Theocrat, and since then the position passed to the Maleviks, who were deposed in 2882 and replaced by the Aleksandrovs. The Aleksandrov reign lasted until the middle of the Emperor Wars, when a series of defeats led the Vladislav line to take over most Aleksandrov holdings. Current politics are chaotic as normal, but the Vladislavs hold the throne. The Romanovs and Vladislavs are on guard against threats from the Malevik and Ivanovich families, each of which wishes to reclaim its lost glory and continually looks for new allies, and the Slava and Sharn families, which are trying to work their way inside from without. Prominent allies of the Crown include the Bogakovs and Czernys, military powerhouses bound by oath to the Vladislavs, the Gurovs, Sfillis, and Innokentis, who maintain good foreign relations for the house, and the Valushnya and Krusczek lines, which are involved in propaganda and intelligence within the house.
The Decados mindset creates a constant struggle between emergent families trying to claw their way to the top and established families trying to keep them in line. These struggles can often distract house members to no end and waste house resources on vendettas and constant mutual surveillance, but they really do cease when the crown or the agency wishes it so. More than any other house, the Decados put aside their differences and cooperate against foreigners. Decados are willing to betray anything and anybody except for the house itself. To the extent that this phenomenon is recognized, it is considered uncanny.
The strengths of House Decados are not immediately apparent, but are no less real for it. Outsiders would consider the chief strength of the house to be its incredible intelligence network, which allows it to use its power most efficiently and bargain from a position of great strength. This is all true, but it is only possible to the extent it exists because of another strength of the house– the uncanny allegiance it can command and the centralization of that allegiance. The weaknesses of House Decados are its poverty of resources, its non-martial orientation, and the lack of trust it inspires in potential allies. The house is fairly isolated, enjoying good if frosty relations with House Hazat, strained toleration by the Church and the Merchant League, and fairly poor relations with everyone else. Indeed, astute students of Known Worlds politics predict its imminent fall from prominence. Of course, they have been predicting this imminent fall for centuries now.
Decados Fiefs
The Jakovian Agency
The Emperor Alexius insisted upon the disbanding of the Jakovian Agency as a precondition for any surrender settlement on the part of Czar Hyram. Despite a number of highly-publicized purges, it is not believed by many that the much-feared spy network has simply ceased to exist. Still, those looking for Jakovian activity have found it far more scarce in recent years than it was before the end of the Second Emperor Wars.
The Fleshcrafters Cartel
A cartel specializing in body alteration, the Fleshcrafters always fight with the Engineers over market share in Decados space. They are quite skilled at cosmetic surgery and body alteration, and they are under constant Church investigation for their genetic engineering facilities
Selected Decados Families
- Vladislav: The royal family. Traditional in its Decados ways, but courting the Empire aggressively and willing to grant concessions. (Crown on Severus, big on Cadiz, Malignatius, Cadavus, Criticorum)
- Romanov: One of the founding families of the house. Has held the crown many times in the past. Rules Cadiz from the city of Vilna (Crown on Cadiz, big on Severus, Cadavus, Criticorum)
- Malevik: Aggressive if not completely subtle, the hot-tempered Maleviks have considerable enmity with the Romanovs and the Vladislavs. Accordingly, they are somewhat exiles right now. (Crown on Cadavus, big on Malignatius, Pandemonium)
- Bogakov: The most military branch of the family, and the most honorable (such as it is). Grudgingly respected but disliked within the house. (Crown on Malignatius, big on Pandemonium, Cadavus)
- Ivanovich: One of the more powerful families at court, though they consier themselves “robbed” of Malignatius’ throne by the Bogakovs. (Big on Malignatius, Severus, Cadiz, presence on Manitou)
- Sharn: Utterly calculating, almost robotic. Up-and-coming, and regarded with suspicion by Vladislavs and Romanovs. (Crown on Pandemonium, big on Severus, Malignatius)
- Gurov: Cultured and subtle, considered by many to be not far removed from the Criticorum al-Malik. The Gurov line tries to maintain good relations with non-Decados. (Big on Cadiz, Severus, Criticorum, Sutek)
- Sfilli: One of the chief Italianate families, the Sfilli line is closely allied with the Castenda Hazat and with the Vladislav line. (Big on Cadiz, Sutek, presence on Severus)
- Slava: Underdog rivals with Romanov family for control of Cadiz. Preach loudly about reform and overtures to Empire. (Big on Cadiz, Cadavus)
- Durneyev: Cultured and witty, often engaged in feuds and vendettas. (Big on Severus, Cadiz, presence on Criticorum)
- Innokenti: Highly religious, but not amazingly honorable. High incidence of theurgy. (Big on Malignatius, Cadavus, presence on Cadiz)
- Bratislav: Excellent with biotechnology, chemicals, and genetic engineering. Under close Church regulation. (Big on Severus, Cadavus, presence on Cadiz)
- Petrovna: Decadent, extremely wealthy and high-technology. Home to many cyberfetishists. (Big on Cadiz, Severus, Manitou)
- Gagarin: The most cultured and artistic of the house, as well as the most psychic and alien. The Gagarin line has long been plagued by troubling visions and portents. Once rebellious, then crushed and bound by oath to the Vladislavs. (big on Severus, Cadiz, Manitou)
- Aleksandrov: Once the crown family, deposed and largely crushed in beginning of Emperor Wars. Now they try to insinuate themselves into the politics of the backwaters they find themselves exiled into. (Big on Malignatius, Cadavus, presence on Pandemonium)
- Krusczek: Courtly family, excellent rumormongers. (Big on Severus, Malignatius)
- Chomolny: Highly mercenary, known to work for the highest bidder. Somewhat outcast. (Big on Cadavus, Criticorum, Cadiz)
- Czerny: Highly disciplined and extremely insular. Excellent rangers and warriors. Serves the Vladislav family (big on Cadavus, Malignatius)
- Turian: Strictly neutral information brokers. Still distrusted by many. (big on Cadiz, Criticorum, Manitou, Sutek)
- Mikoyan: Ardent supporters of the cartels. Often come into conflict with the Merchant League. (Big on Severus, Cadiz, Criticorum)
- Valushnya: Home to many scholars and intellectuals. (Big on Severus, Cadiz)
- Romany: Naval family, fond of life in space. Allied with Bogakov line. (Big on Severus, Cadiz)
- Tatarin: Somewhat Li Halan-influenced, this family is very religious (though not always Orthodox) and somewhat anarchic. (Big on Malignatius, Manitou, Cadavus)
- Sobor: Dissidents highly persecuted by Czar Hyram. (big on Malignatius, Pandemonium, Cadavus)
- Tchaikof: The most decadent of the house, considered to be degenerates and failures by all, but still tolerated because they are the family of Antonin and Jakob. (big on Cadavus, Cadiz)
- Strelnikov: Allied with the Castenda Hazat, still trying to demilitarize after the war. (big on Severus, presence on Sutek)
- Vaclav: Warrior family (presence on Malignatius, Cadavus)
please note that a lot of this doesn't make exact sense because we aren't playing in that universe but it gives an example of a developed noble house