Board Thread:Lore Discussion/@comment-25291590-20130317093523/@comment-5293900-20150316003432

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Again, nothing is confirmed or denied regarding the topic of interbreeding between men/mer and the betmer (beast races). Notes on Racial Phylogeny (as far as Elder Scrolls Lore is concerned) does not deny the possibility but does not confirm it either. So as far as official Lore goes, it is unknown.