Board Thread:Unity general discussion/@comment-26456975-20150908221144/@comment-13471981-20150909152518

Arno is an ancestor of an unknown person from Montréal. That's all we know. Robert Fraser was the dude assigned to relive them, like the Abstergo Entertainment Analyst was for Edward Kenway's memories. Desmond is not related to Arno in any way. Here's the quote from the Assassin Intel thingy with Melanie:

"Yeah, I thought the same. Let's see... Another sample we checked came from a local Montrealer. That sample revealed an ancestor named Arno Dorian from Revolutionary France. Arno wasn't a Sage himself, but initial reports suggest he may have come into contact with one."