Greetings to you!

A few years ago, I created a Xaela named Erdenechimeg using a fantasy name generator that focuses on lore-friendly names. However, a chance encounter now calls the validity of said name into question.

According to the official naming conventions, Xaela names are based on Mongolian names or words used during the 15th century, give of take a few centuries. Going by the most literal definition of "a few", that would probably include everything from the 11th or 12th to the 18th century.

Sadly, extensive research points to the name itself being rather modern, mostly in use starting from the 20th century, which would probably be a bit too much to still count towards "a few". Since Xaela names can also be based on words, I now need to know whether the words "erdene" as well as "chimeg" saw utilisation during the given period of time. According to Wikipedia, "erdeni" was used in the creation of Mongolian names starting from the 16th century, but I've found no mention of "chimeg", nor do I know how closely "erdeni" and "erdene" are related to each other and whether "erdene" is just a case of differentiated grammar or a more modern version of the same word (which would obviously be bad).

To summarize: does anyone know whether or not the name "Erdenechimeg" was in use during the time period mentioned above or, if not, whether or not the words "erdene" as well as "chimeg" saw any usage?

Kindest regards and thanks in advance
Neopteron