Here's perfect example from my current DE-campaign. Two things:
1.) Anakonda, a female general. I got question to hire someone (russian ofcourse), and was surprised it was Anakonda (Cow team apparently added her for DE too, which was nice), tought she is missing her unique portrait and stratmap-model for DE, but I'll fix those for next release.
I had Heroic-victory with her, and got "Man of the hour" proposition

Well, I accepted, and she became part of the family, seen on left below the faction-leader, with normal portrait. Now she is married, and have kid too

Don't know how those Amazons breed without males, but oh well..
Nothing game breaking, I could had just decline the joining to the family offer, as well marriage, but I didn't know who they were for since names are russian, and she would still be just a general, with no change of getting married. So it's more up to the player if he/she wants to have "outsiders" in family tree if the chance comes, and make them marry someone, and having kids.. Imo it's not a problem since mercs and spawning generals are not part of the family, unless you want to.
2.) Witch-Sorceresses. The army that spawned was one unit of sorceresses, and one unique general character. General has DE-warriors bodyguard (!), and is using Sorceresses model for herself. You can see both in the screenshot, I just replaced the unitpicture, and general portrait to match with my new battle-model, but otherwise they are vanilla-CoW.
Hag Witch could be used as replacement of the unique general imo, just the model would need to be changed to be that.

If not otherwise, then just to make it different from the Sorceresses. And for the Cauldron of blood ofcourse.
