Board Thread:Lore Discussion/@comment-25291590-20130317093523/@comment-118.92.175.253-20190313232315

From what I've gathered here's how crossbreeding in Elder Scrolls works:

Men and Mer = Fine, that's how we ended up with Bretons

Khajiit and Men = Nope

Khajiit and Mer: Male Khajiit and Female Bosmer since Bosmer are their closet relatives

Argonian and Everyone Else = Nope

And as a bonus, half vampire is a thing, Oblivion had the Grey Prince, a half-vampire orc, one of his parents being a vampire