That’s because I wasn’t aware of the topic at the time, so I did some reevaluation of my current thoughts. At the end, all that lineage did was just assert how Hararis have ties with Darod clan as a whole, and it all starts with Abdurahman Gabarti.
The founder of the Darod clan is named Abdurahman Jabarti, as noted by many sources. Oral sources say that Abdurahman Jabarti was an Arab, but like other lineage stories we can take that with a grain of salt.
The last name Jabarti leaves us with a lot of clues. If we look at Egyptian sources, we notice that they referred to people from the Horn of Africa as Jabarti or Gabarti. This suggests that Abdurahman Jabarti was most likely from the Horn of Africa. To make things more interesting, the Abysinnian Chronicles mention of a land called Gabar-ge, which was a Muslim land that they took over and was ruled by a Hegano. Gabar is a harari word referring to tame or vassal (more info in the screenshot I sent). Hegano is a harari title for a leader, stemming from the word hegana, meaning to replace (I sent another screenshot for that).
When looking at the tree you showed, I agree with the author of the one who documented that tree saying that “it’s possible to suppose that their integration into Somali lineage is later than the 16th century” (I screenshotted that too). AKA assimilation. We know Marehan is not the brother of Harti and Kari, hence that family tree was giving a generalization and not specificity, especially considering it goes way back and there are gaps in the lineage as it goes up.
Look at the names of the three clans next to Harla. Marehan I already explained its meaning before. Harti and Kiri are really interesting because it’s exact opposites of each other in the Harari language. Harti means “ she went/left (-ti is “she” and Hara means “go” and Hara becomes Har when a suffix is added) and Kiri means “stay (command to a female, root word is kara)”. I sent screenshot of those two below as well. And considering their ancestor was Koombe, which has root word “kum” in harari language like the ancient town of Qumizar (screenshot of that is also sent below). If you look lower in the list, you can see Harari names like Awari (saint of Harar, meaning Aw Strange) and Dus (honey).
Hence, Darod are related to Hararis.
You also know how he was able to do that if you read the book. He didn’t write it in Harar but in one of the Somali villages with the help of a slave fluent in many languages (there were a few mistakes but otherwise really well done). Richard Burton has the most accurate source for his time, ofc he had to since he was in the employ of the British govt (prolly a spy).

ok I’ll refer that over to Dr. Sherif

. He’s working with some researchers to digitize most of the manuscripts.
Cope? You know the same author said that Somalis weren’t part of Adal?