My post of 11 April 2022 had a statement which, although it appears widely printed -- and I copied it as I saw it -- is incorrect.
This was when speaking of the descendants
of Baha'u'llah through the designated Guardians.

It is correct that the Guardian known as Abdu'l Baha
was one of Baha'u'llah's sons.

I stated, however, that Shoghi Effendi was the son of Abdu'l Baha,
and this is mistaken.
Abdu'l Baha's children included
Diya'iyyih Khanum, the oldest of his daughters.
She in turn married, and
Shoghi Effendi was her son.

Thus, Abdu'l Baha and Shoghi Effendi
are grandfather and grandson, not father and son.