Half-drow

A half-drow was the offspring of one human parent and one drow parent. A half-drow generally had dusky skin, silver or white hair, and human eye colors. They could see around 60 feet (18 m) with darkvision, but otherwise had no other known drow traits or abilities.

Society
Half-drow were most commonly encountered in Dambrath and in the Underdark. House Ousstyl, in particular, was known for having mated with humans.

History
Half-drow were often conceived when a male drow mated with one of his human female slaves or when outcast drow mated with surface-dwelling species.

Xandra Shobalar encountered a merchant in Mantol-Derith, ostensibly human, who was in fact half-drow. Perhaps indicative of the drow view of such things, she found his suspected nature to be appalling. .