Allot of titles used by Mongols or even later Turkic tribes are actually of Iranic origin.
As another example "Ashena" a ancient tribe and later ruling dynasty among Turkic speakers.
The Ashena however were actually a Scythian tribe and became turkified. Since they also existed among the Saka and the word Ashena derives from Irani tongue and means simply "blue".
http://en.wikipedia.org/wiki/Ashina_%28clan%29
"blue" as in "blue sky". The reason why the first Turkic dynasty and people called themselves "Gök Türk". Gök is the Turkic word for Sky.
Ashena is the Iranic word for blue or "blue Sky". Since Turkish word for blue is "Mavi" but in Kurdish as comparison it is "shen" (I use kurdish because I am fluent in it).
Either Ashena is the Scythian equivalent to Kurdish "shen" or it is a combination of two Iranic words.
Kurdish "shen"= blue
Kurdish and general Iranic Asman = Sky
In Kurdish we would translate "the sky is blue" = "Asman Shena". Combine the words = Ashena? But this is only speculation.
However it is no speculation that Ashena and Kurdish Shen are related and both mean "blue"