동성혼

Etymology 1
.

Noun

 * 1) same-sex marriage

Etymology 2
.

Noun

 * 1) marriage between two people with the same surname; this was considered nearly incestuous in Joseon Korea (1392—1910), even if the surnames were only coincidentally the same, and was not fully legalized until 2005

Usage notes
The same-surname marriage sense was traditionally much more common, as same-sex marriage was not a social issue in Korea until relatively recently, but it has now been largely superseded by the same-sex marriage sense.