Khan (also known as kaKhan) is a high rank in Clan society, designating the leader of a Clan.
When the Clan requires military action above the small scale skirmishes that are Trials of Possession, the Clan Council becomes a Kurultai (War Council) and it elects from within a council member to become a Khan. The Khan (though having much more influence) can't interfere with Clan laws/society; that is still in the hands of the Council. He/she is, however, commander of the entire Clan's military assets, including the touman, and becomes the top of the military hierarchy that doesn’t exist without a Khan.
The first act of the Khan is to select a saKhan (junior Khan) from amongst the Clan Council members. The saKhan’s duties aren’t specifically defined. He/she is the second in command, performing any duties the Khan requires (like bidding or leading a campaign) but can’t do him/herself and enjoys a heightened status within Clan society. The official term for the senior Khan of a clan is kaKhan, though this is rarely used (Khan with no prefix usually means the senior Khan).
One noteworthy (but obscure) feature that the Khan can do is split their assets to form a new clan. Notable examples include the Warden portion of Clan Wolf into the Exiled Wolves after the Refusal War and Clan Stone Lion from former Hell’s Horses assets claimed by Clan Star Adder after the Wars of Reaving. 
Clan Blood Spirit
Clan Cloud Cobra
Clan Diamond Shark
Clan Fire Mandrill
Clan Ghost Bear
Clan Goliath Scorpion
Clan Hell's Horses
Clan Ice Hellion
Clan Jade Falcon
Clan Nova Cat (SLDF)
Clan Smoke Jaguar
Clan Snow Raven
Clan Star Adder
Clan Steel Viper
Clan Wolf/Clan Wolf-in-Exile
- ↑ Warriors of Kerensky - Clan Government, p.56
- ↑ The Wars of Reaving, p. 146-149
- ↑ Field Manual: Warden Clans, p. 48
- ↑ Field Manual: Crusader Clans, p. 45
- ↑ Field Manual: Crusader Clans, p. 97
- ↑ Theoretical rank insignia. No freeborn has ever held this rank in Jade Falcon touman.
- ↑ Field Manual: Comstar, p. 112
- ↑ MechWarrior: The BattleTech Role Playing Game, Second Edition, Color plate section
- ↑ Field Manual: Warden Clans, p. 127
- ↑ Field Manual: Crusader Clans, p. 120