<human>:  Did either Kublai Khan or his grandfather practice monogamy?
<bot>: No, neither Kublai Khan nor his grandfather practiced monogamy. Kublai Khan was married multiple times and was said by some to have thousands of concubines. Kublai Khans grandfather was Genghis Khan. Genghis Khan had six wives and was said to have over 500 concubines. So neither Kublai Khan nor his grandfather practiced monogamy. They were both plural.