@CS
Dovid Hamelech lived close to 3 thousand years ago. If you consider 30 years as the average for it to be considered a ‘new’ generation , we are talking about one hundred generations [about].
In ten generations ,every person has 1026 antecedents . Of your 1026 grandparents ,after you go back the first ten generations, each one has , going back another ten generations , another 1026 antecedents.
Another 10 generations equals another 1026 forebears. Do your math- 1026 times 1026 times 1026 equals ?
Over one trillion zaidies and bubbies for each of us , all living in the times of Dovid hamelech.
There weren’t so many zaidies , simply because not so many of them existed in dovid hamelech’s times.
So we will HAVE to say that many zaidies and bobbies are a multiplication of ‘zaidihood’.
And that statistically speaking, it would be very unlikely if anyone in that generation would not be a bobby or zaidy.
So probably we would be hard pressed to find someone nowadays who we could categorise as a NON GRANDSON of Dovid Hamelech.
All the rebbes nowadays have an impressive yichus going back to the most meyuhas mishpachot in klal yisrael, this is well known.
If you go through their yichus you will most certainly get to Dovid Hamelech .
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If you are looking for ben ahar ben , I don’t think that the leader of the habad hasidim is either. edited