genticide

noun2

1. •
   (rare) The killing of a race or nation of people; the slaughter of an ethnic group; a genocide.

   • When we call unjust war murder, we give it too mild a name. It is wholesale murder; it is what might be denominated genticide, or the murder of nations. — 1837
2. •
   (rare) The killing of a kinsman or kinswoman; the murder of a blood relative.

   • Thus the hatred of the kin group was the highest penalty for genticide or the murder of a clansman: […] — 1916