Nogai, or Noğay (; also spelled Nogay, Nogaj, Nohai, Nokhai, Noqai, Ngoche, Noche, Kara Nokhai, and Isa Nogai; died 1299/1300) was a general and kingmaker of the Golden Horde and a great-great-grandson of Genghis Khan. His grandfather was Bo'al/Baul/Teval, the seventh son of Jochi. Nogai was also a notable convert to Islam. Though he never formally ruled the Golden Horde himself, he was effectively the co-ruler of the state alongside whatever khan was in power at the time and had unrestricted control over the portions west of the Dnieper. At his height, Nogai was one of the most powerful men in Europe and widely thought of as the Horde's true head. The Russian chroniclers gave him the title of tsar, and the Franciscan missionaries in the Crimea spoke of him as a co-emperor. Name French historian Paul Pelliot wrote that Nokhai meant "dog". Although in the Mongolian language, "nokhoi" (in Mongolian script: , nokhai) literally means a "dog", 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. Thus dogs became big part of nomadic life and also played a big part in their religion. According to British historian J. J. Saunders, the name "Dog" was used to distract the attention of evil spirits (presumably, they would not be interested in a canine). The Mongols sometimes referred to the wolf as a "steppe dog". Early life under Batu and Berke Nogai was born to Tatar (Tutar), a son of Terval who was a son of Jochi. He would rule his grandfather's appanage after his father died. After the Mongol invasion of Europe, Batu Khan left Nogai with a tumen (10,000 warriors) in modern-day Moldavia and Romania as a frontier guard. He was a nephew of Berke Khan as well as Batu Khan and Orda Khan, and under his uncle, he became a powerful and ambitious warlord. Second Mongol invasion of Poland In his later years, Berke began to delegate more and more responsibility to his promising nephew. Nogai's leading role first appears, along with Talabuga, under famous Mongol