Hakton VII was an inhabited planet located in the Demilitarized Zone created by the treaty between the United Federation of Planets and the Cardassian Union of 2370.
In that year, Deep Space 9 received a report that the Cardassians, in response to the destruction of the Bok'Nor, killed three Federation settlers on the planet. (DS9 episode: "The Maquis, Part II")
Ranul Keru's father, stepmother, and teenage sister lived on the planet. (TNG - Section 31 novel: Rogue)