Wait a sec, I'm genuinely a bit confused here. Help me sort this out. Quoting from the your own source;
The Ehlnofey who lived there were the ancestors of the Mer, and their solidarity allowed them to retain more of their ancient knowledge and power. The other Ehlnofey, who were left scattered around Nirn, had a harder time adapting, and were dubbed the "Wanderers". For whatever reason, war eventually broke out between Old Ehlnofey and the Wanderers.
and
The Ehlnofey of Tamriel became the http://www.uesp.net/wiki/Lore:Dwemer (Deep Ones), the http://www.uesp.net/wiki/Lore:Chimer (Changed Ones), the http://www.uesp.net/wiki/Lore:Bosmer (Green or Forest Ones), and the http://www.uesp.net/wiki/Lore:Altmer (Elder or High Ones). The Wanderers became the humans of http://www.uesp.net/wiki/Lore:Nirn, eventually splitting into many different racial groups, including the http://www.uesp.net/wiki/Lore:Nede, http://www.uesp.net/wiki/Lore:Nord, the http://www.uesp.net/wiki/Lore:Redguard of http://www.uesp.net/wiki/Lore:Yokuda, the http://www.uesp.net/wiki/Lore:Tsaesci_%28race%29 of http://www.uesp.net/wiki/Lore:Akavir, and other aboriginal groups.
So, the Ehinofey --> Mer folk. Wanderers ---> (for sake of the argument) the "human" folk. The quote says "aboriginal", meaning I guess that due to their wandering the Wanderers de-evolved a bit?
So then, all races except Argonians are blood-related. Check. Unless Argonians are related to the Tsaesci --- I don't know. But how can you say it proves nothing else? It states that the Nedes, Nords, Reguards, and Tsaesci all share a further and closer ancestry, which is not so much a stretch to just call "human". Are we just arguing over semantics here, or am I missing something? I'm not trying to be "smart", I'm enjoying the lore conversation. Please, show me what I'm missing.