err mongols conquer levant. A mongol prince gets smitten with loveand marries a native who happens to be jewish. Since the mothers determine the religion in Judaism sons born to them are technichally jewish...
Its very implausible but hey its not asb.
You just need to Oeulen's (temujin's mother) tribes nobles are practicing Judaism.
You see if we really believe in proselytizing Judaism it does not actually matter whether it was Temujin's mother or father who became jewish, or his grandfather or grandmother.
Nothing wrong with it. Just very implausible.
But we all know that it's better be mother or grandmother, meaning Jewish bloodline from mother's side. But here we mean Judaism AND bloodline.
Here we should stop and understand an important thing about the Mongols of the 12-th and 13-th centuries:
- the Mongols were not monogamous, but there was such thing as a principal wife and she must be from a "proper" bloodline. For a noble Mongol proper bloodline was a "steppe" bloodline, meaning no Chinese, no Ephiopian, no Greek, no Vietnamese blood, actually no other blood but pure blood of the steppe Mongols and other steppe tribes close to the "Mongol" tribal core.
And sorry, but no Jewish bloodline. Sorry again, but no.
You know a member of Borijin clan might have a lot of wives, but the only wife that mattered was the principal wife and her children.
So a Borijin, a son of an "improper" (Jewish by blood) mother uniting the Mongols and becoming the Chengizz Khan? - No, I do not buy it.
Grandson of Chengizz Khan born by a Jewish (by blood) mother becoming a Khan and establishing his Khanate? - No, the title "Khan" is only for Borigins borne by a principal wife of proper steppe linage.