Googling around indicates that the "Khan World League" uses allegiance code "Gk" and appears in Reavers' Deep. Looking at older world data such as at:
http://zho.berka.com/data/CLASSIC/s...tor=REAVERSD&subsectorletter=E&javascii=ASCII
... it is given the alternate name "Grand Khanate", and includes these worlds:
Code:
Marie 0716 C313767-7 Ic Na 722 Gk M1III
Tembo 0717 C684566-7 Ag Lo Ni 504 Gk G1V
Cyne 0816 C878662-5 Ni 900 Gk M6V M1D
Khan 0817 B5219CC-A Hi In Na Po 313 Gk M5V
This polity doesn't exist as a defined allegiance in the T5SS. But if you look at the data, these worlds in Reavers' Deep are listed as being "owned" by Khan 0817:
Code:
Marie 0716 C313767-7 Ic Na Pi O:0817 722 Na G3 V
Tembo 0717 C684566-7 Ag Ni Pr O:0817 504 Na M0 V M5 V
Cyne 0816 C878662-5 Ag Ni O:0817 900 Na M0 V
Khan 0817 B5219CC-A F He Hi In Na Po 313 Na K9 V
From:
http://travellermap.com/data/reav?type=legacy
So there you go - officially there are a set of worlds controlled by Khan, but the name of this polity itself is not (currently) considered official/canonical.