DNA & family trees in TS4

Hm, I'm currently working on the Capp family.

We don't know anything about Tybalt Capp's wife, do we? She is not listed in the family tree shown in misc videos. But, Tybalt is read haired, and his 3 children Beatrice, Celeste and Virgilio all have different hair colors (brown, black, blond). Based on only one hair gene from each parent, and the fact that none of the kids have red hair, technically Tybalt must have had the children with 3 different females? All dead? Some of the childreen might of course have dyed their hair, but 2 of them? Could it be that Virgilio originally had black hair (ref his beard being black), and  could Beatrice be originally redhaird, but dying it brown? If so, Tybalt's late(?) wife had black hair, and he might have been married just once.

I'll need to see the in game family tree regarding each child's mother to complete my task. Any imput appreciated :)

Technically alot of the dead Capp as well as Thebe ancestors from the sims 2 have a wide variety of different coded hair colors (Ex: Celopatra Capp had brown hair according to SimPE before she died of old age) which in theory could be where Beatrice, Celeste and Virgilo get their hair colors from. Unfortunately they don't appear on the Sims 4 family tree to make that connection.

The family tree doesn't show their mother

I'm busy creating dynasties. It seems like the system is raher strict on who is invited, I often think Head's siblings would be natural members, but that might because my Houses are older and siblings are the children of Head's parents, who once were Head.

Now I came accross another surprise. Head (green) invites son and son's 2 childeren, ignoring son's wife, although they are indeed married and they all live in the same house. Left half o the picture below. Christoph's other son was also ignored, but I guess that is because he was already member of another dynasty.

The wife had one son from before she married intoi this House, could it be that the game gets it wrong when a sim has more than one partner? I can pretend that Head of this dynasty was a Priest most of his life, and he might exclude daughter in-law because she got her first child without being married...

Edit: It happened again in another dynasty. In both cases the ignored wife is Head's daughter-in-law, and now I think it's by design. I hope when Heir's son becomes next Head, he can invite his wife into the dynasty. If so, it means members are found horizontically only on Head's level, the rest only vertically.

Edit II: I'm learning from failing! It seems like only the closest family is added when the dynasty is created. There might be more possible members if you click "add members". I thought that would be for later. In one case I noticed Head had not invited her brother. He lives in a different world, so I though that was the reason. By "add member" he could be added. I then did something else in m y game and retuerned to the dynasty UI a bit later. Then I could "add member" again and found the brother's wife and children. They were greyed out though, with the message that relation to Head was too low. Which makes sense. So, relation has an impact, and even if you don't find a specific relative, s/he might be an option the next time you check.