Lol, looks like all elves and such in Tamriel evolved from a common ancestor of the Troll.
I think pritty much everyone in Morrowind, Oblivion, and Skyrim shares that common ancestor.
theres a reason orc are also called orsimer... lol...
they all came from the ancient altmer: aldmer, bosmer, dunmer, orsimer, dwemer, and also ayleids.
the altmer came from ancient alinor to settle tamriel long ago, and the nords were the first of man to settle tamriel from atmora.
before mer and man came khajiit and argonians were the dominant races of tamriel. the altmer were the ones to drive them into their current regions.
redguard came from yokuda, and derive their name from the ra gadda warriors that first settled in hammerfell. they're the only humans to not share common ancestry.