Pedigree Chart of Pōtatau Te Wherowhero.

Now using this chart, Te Kapu is Paretaheke Te Aho and Ramarihi is Whāriki Te Aho and they are both sisters  and daughters of Irohanga.and Kura Tiari and they both married the same chief Te Keha aka Te Aho  
It was through finding Irohanga that the connections became clear as he was a big chief and from the Kawai Rangatira "Chiefly Line" He was killed during war when he avenged the death of his son Maungatautari. he was found in the Whakapapa here and it led to his daughters and his moko Wētere Te Aho.  now Whariki has 3 kids in this whakapapa "Neha, Ruini and Hapimana,  which differ from the Minutes so I reckon that everyone had many names back then but I had to focus on the names that I knew. 
Now it's only a possible reason but I think the only reason Wētere is the only child mentioned here is because he is the eldest and the only one who sticks in the mind of these kaumatua but today we know that he isn't the only child. 

So therefore the shape of the whakapapa at this point is 

From the Top

Hekemaru___Hekeiterangi 
            Paretāhuri ___ Mahuta___Pāoa
Mahuta_____Kiringaua
            Uerata 
Uerata______Puakirangi
            Huakatoa____Hourua ____Wharetiperi ______Tapāue
Hourua_____ Pukauae
          Te Umukiwhakatane_Pokohuia_Te Ahōterangi_Te Moko_Taiko
Umukiwhakatane_Parengaope
           Whakamarurangi
Whakamarurangi_ Hinematua
         Poka___Rangimaunu__Irohanga__Te Riunui
Irohanga______Tiari
     Here_Muriwhenua_Maungatautari__Paretaheke_Whariki
Paretāheke___Te Keha
     Wētere,_ Parerāware_, Maunganui_Ngarongo,
 Wētere_____ Riria
          Ngārongo_Ngāparaihe_Rangiwawae_Pepe Rangiwawae.
Ngāparaihe_ Hori Tiriwa TeOti.

Maungatautari is not in this chart but he is the Tupuna of Dr Pei te Hurinui and if Dr Pei says he should be there then he is. Also with māori whakapapa, unlike Pakeha structures
Your parents are also the siblings of your real parents which is why the term matua or whaea applies to everyone in your family once you realize that this is the structure then it starts to make sense, and throughout this whakapapa you have some saying that this son is theirs aswell example Muriwhenua-Irohanga's son or Te Ahōterangi? Te Umukiwhakatane and Te Ahōterangi both  married Parengaope and I imagine Muriwhenua was whangai by Parengaope because it's her Moko Muriwhenua had a son Pohepohe kIngi whom some of the Kingi whāhau come from and the name Irohanga runs through there family so It would make sense if he was whangai'd by his nana Parengaope. 
Now even more interesting because there is a direct connection to Hekemaru (declining power) and Hekeiterangi (Arrived from heaven)
There is a connection to 7 canoes that came to Aotearoa not forgetting that these kingites are the kaumatua that put Potatau as king because he was blood related to 7 canoes. As we branch from the same whakapapa then we do as well.
We break away from the Potatau during Uerata and Puakirangi as Hourua was female and her brother Tapāue was Potatau's tūpuna.
Hourua's son Te Umukiwhakatane was the older brother of Te Aho o te rangi who married back into Tapāue's line and he shared the same wife Parengaope with Te Umukiwhakatane. I do think though that this Te Aho o te rangi is different from Wharepu. because it would mess up the Whakapapa because this is before Pōtatau was born. 
I truely believe that all the accounts of Te Aho o te rangi wharepu are incorrect as he is said to be Ngati Mahuta and the son of Potatau but he can't be Grandfather of potatau's mother and potatau son as well, I blame the many people searching for him and making up the stories on their way.  Truth be known Wharepu chose to be buried in Kaiaua because his mother was from there, Our tūpuna Te aho/Te keha is buried in the Urupa at Manuaitu. and again that differs from stories out there. Incorrect details like this can bring about issues such as pōrangi too. I feel it is important to note that we are related to Te Kāhui Ariki but we are not Kāhui ariki, our ties start from before the Kingitanga, so we are from "Te Kāwai Rangatira" The line of Chiefs. 
The  above Whakapapa was held by Wiremu Nero Te Awataia he was the holder of Whakapapa for Tainui and he was the chief of Raglan area. There is a museum there which speaks of his mana and his history.

This connection of 7 the canoes can be found here in this link
but from this whakapapa Māhuta is missing and he is the main part of this whakapapa because he is the Father of Ngāti Māhuta.
http://www.kiingitanga.com/Kiingitanga_Whakapapa.pdf


As a matter on interest how does our Whakapapa stacks up in a generational sense.

Hekemaru__________________ Heke ite rangi 

Mahuta  ______________Kiringaua  

Uerata _____________ Puakirangi

Hourua                                                    Tapaue
Te Umukiwhakatane                                Te Putu
Whakamarurangi                                     Tawhiakiterangi
Irohanga                                                 Tuata
Paretaheke                                               Te Rauangaanga
Wetere                                                       Potatau
Ngaparaihe                                               Tawhiao
Te Morehu                                                 Mahuta
Jack                                                          Te Rata
David                                                        Koroki
                                                       Te Ataiirangikaahu

etc                                                                etc

We share a few common tupuna with the royal family

Te Putu is our last tūpuna, He was a great Tohunga and was Tapu. It is said that upon his death he was buried on Taupiri Maunga and he is the reason it is Tapu and it is now the final resting place of his descendants. He  is the great grand father of Potatau
he is also the father of Hine Matua Irohanga's mother.