Para-Mongolic contains certain historically attested extinct languages, among them Khitan and Tuyuhun.
The languages of the Xiongnu, Donghu and Wuhuan might be Para-Mongolic,[1] as might those of the Xianbei and the Tuoba (the founders of the Northern Wei) and Khitan.
Because the surviving evidence for Xianbei and Tuoba is very sparse, one can only hypothesize that a genetic relationship could be possible.
Shimunek classifies Tuoba as a "Serbi" (i.e., para-Mongolic) language, along with Tuyuhun and Khitan.
[6] Juha Janhunen (2006) classified the Khitan language into the "Para-Mongolic" family, meaning that it is related to the Mongolic languages as a sister group, rather than as a direct descendant of Proto-Mongolic.