They're fairly minor side characters, but two of the caravan guards in my story (who will show up soon) are fraternal twins.
Their names are Emi and Johei, and when they were babies, their mother fled their homeland with them, because the king had had a dream that he was murdered by a pair of twins, and was so paranoid that he ordered that all twins in his country be killed. So Emi and Johei grew up on the road, moving from place to place, and just... kept doing that into adulthood.