Gran-air, the first group of runaway travellers, included people of various social background and races.
According to the official citizen ranking table of Yüv,
the society was split into following classes:

Ultimate
High Upper
Middle Upper
Lower Upper

High Middle
Middle
Lower Middle

High Lower
Middle Lower
Lowest

Marginals and outcasts were not considered as a rank and thus ignored by official statistics and census.

Major Races populating Yüv as of year of koor epoch:

Sebago h
Mogo f
Rotego n m k
Hidago l
Dalgo maena