Lorick #68:

We founded a dangerous dynasty;

Two brothers - both mothered abnormally!

Our legacy: lengthy,

Our empire: strengthy!

...though captured by mono-theology.

But first, we solve #69 - here it is one last time:

I'm a king, I'm a spook, I'm a play

and my son is a kook many say

My wife? disappointing -

My brother? anointing -

Come, thou horrible reckoning day!