Taeodor is a young elf man attending the wedding in the City Elf Origin.
If the Warden initially speaks with him, he asks if he/she has seen Soris. Speaking with him after Soris joins has a conversation where he informs that his brothers are not coming since they ran off to find the Dalish, to which Soris reassures him "they'll probably be back in a few days embarrassed and hungry." If the Warden inquires further, he'll comment that Alarith claims to have been rescued by them once.
If it wasn't received when first meeting Soris, the Codex entry: The Dalish Elves will be obtained.