Thunderclan - House Stark (Main characters, honest, loyal, family-oriented)
Windclan - House Mormont (Proud, skilled, aloof, untrusting)
Riverclan - House Tully (Easygoing, like the flow of the river, calm unless provoked [mainly using Riverstar as a reference])
Shadowclan - House Martell (Confident, elusive, mysterious, rebellious)
Skyclan - House Arryn (Distant, enjoy high places, currently have new beginnings)
Starclan - New Gods (More recent than the Old Gods, most common belief)
Bloodclan - House Bolton (Ruthless, cruel, wear "trophies" from defeated victims)
The Dark Forest - White Walkers (living dead, enough said)
The Kin - House Tyrell (Look good on the outside, horrible on the inside, extremely ambitious, willing to do anything to get their way and doing so without you knowing it)
Dodge’s group - House Lannister (Sadistic, like to get what they want, sly, tricksters, have morals despite how they portray themselves)
Stick’s group - House Frey (Came from nothing, proud, ornery)
The Tribe of Rushing Water - Island of Braavos (Secluded, kind, different beliefs and traditions than the others)
The Ancients - Children of the Forest
The Early Settlers - First Men
Slash and One Eyes group - House Greyjoy (Proud, only have eyes for the strong, conquerors, ruthless)
Loners - Night's Watch (Often live alone, never staying in one place, travelers, some have left their families and clans/houses behind)
Rogues - Wildlings/Free Folk (Defend their land, sometimes try to take others' land from them, proud)
Tribe of Endless Hunting - Old Gods (Formed before the New Gods)
Cats of the Park - Andals (Don't know much about them, it just seemed to fit)
These are my opinions