Just wondering how many have been found. I mean, You've got Motierre's in both Oblivion and Skyrim's Dark Brotherhood questlines. (I like how opposed they are, the former is trying to save himself from murder via the DB, looking out for number one, while the latter is out for a grand scheme with massive far reaching consquences.

I'm sure I've come across other ones, I just can't remember right now. I like these little touches though. Even just the direct references to things, like the Lucky Old Lady in Bravil.

You can find
And you meet during the DB questline as well.

This should really be in the spoiler section.

Well, there's a Dunmer in Riften who is directly descended (or at least claims to be, and quite loudly) from Valen Dreth, the Dunmer who's harassing you at the start of Oblivion.

That's the only one I can recall off the top of my head. Although many of the Dunmer in Skyrim--not just Romlyn Dreth--bear some familiar surnames, especially for folks who have played Morrowind. There's a few Hlaalus in Windhelm, and the Sarethis on their farm in the Rift are more than likely related, directly or tangentially, to http://www.uesp.net/wiki/Morrowind:Athyn_Sarethi of House Redoran.

http://www.uesp.net/wiki/Skyrim:M%27aiq_the_Liar: "M'aiq's father was also called http://www.uesp.net/wiki/Oblivion:M%27aiq_the_Liarhttp://www.uesp.net/wiki/Morrowind:M%27Aiq_the_Liar. As was M'aiq's father's father. At least, that's what his father said."

http://www.uesp.net/wiki/Skyrim:Dervenin: He was http://www.uesp.net/wiki/Shivering:Dervenin in the Shivering Isles. Technically he is not a descendant, he is the same person.

http://www.uesp.net/wiki/Skyrim:Brelyna_Maryon: She had http://www.uesp.net/wiki/Morrowind:Felen_Maryon in House Telvanni, he was a spell vendor/spell maker that lived in Tel Branora.

http://www.uesp.net/wiki/Skyrim:Romlyn_Dreth: He is an ancestor of http://www.uesp.net/wiki/Oblivion:Valen_Dreth, the Dunmer that taunts you at the beginning of Oblivion.

http://www.uesp.net/wiki/Skyrim:Belyn_Hlaalu and http://www.uesp.net/wiki/Skyrim:Niluva_Hlaalu are part of the http://www.uesp.net/wiki/Morrowind:Hlaalu_Ancestral_Tomb#Family_Members.