The Addams Collective.
The Addams Family is actually a single being and a collective. No one, outside of them/ it knows or remembers their origin.
They aren’t actively hostile to humankind… but neither are they beneficent. And they are very, very inhuman in their reactions and responses even if they have learned to fake being human pretty well over the centuries, adapting more with each 'spouse' brought in.
They appear fully human in more modern times, except for on odd occasions when their inhuman nature would break out and they'd do something physically impossible for humans like free climb the outside of skyscraper to get to the roof by scurrying up the sides.
By joining or marrying into it a person becomes part of the collective and the next best thing to immortal. Children are created in the traditional way but they grow up as part of the Collective from birth.
They also have access to 'storage' which has anything a previous Addams ever owned or a new Addams has brought in. When seeking for an item a member of the family's few scans, then focuses their sight on where the item is in storage.
The reaction time of the detachments increases when away from the central source of the being.
If an Addams from their side of the family crossed the sea, they were out of range of the creature. If they died there, the being was left with only the gathered impression of them. Sort of like a magical portrait from Harry Potter only they weren't able to move away and needed to be fed energy and maintained by the being while the living ones could maintain themselves.
As all were part of the collective, it was possible to consult ancestors many generations back though some were 'sleeping' and couldn't be awakened while some woke and were active rarely. If there was a need, they could be accessed.
The being the American version of the Addams family was isn't the only one of its kind.
It has spawn around the world creating their own version of the Addams family and they can communicate though not support a detachment across an ocean.
Only digital life hasn't been incorporated so far.
Magic of the Frankenstein and voodoo sort exist and the being/s can make use of both sorts easily.