Nogai Khan
Nogai (died 1299), also called Isa Nogai, was a general and de facto ruler of the Golden Horde and a great-great-grandson of Genghis Khan. His grandfather was Baul/Teval Khan, the 7th son of Jochi. His name is also spelled Nogay and Nogaj.
Pelliot wrote that Nogay meant a "dog." In fact, in the Mongolian language, "nokhoi" literally means a "dog"; however it does not necessarily mean a particularly negative and insulting name in its context, since people were called "dogs" among the Mongols at the time and sometimes presently as "nokhduud" as in "you dogs (guys/men/people)." Genghis Khan also called his capable generals "dogs of war" or "men of war." This probably came about because Mongols had a lot of dogs, and dogs were very useful for people's lives in hunting and warnings.
Read more about Nogai Khan: Early Life Under Batu and Berke, Rise To Power in Golden Horde and Europe, Decline