Warhammer 40K Planet Name Generator

Warhammer 40,000 planet names come from a mix of Latinized High Gothic, real Earth mythology, and grim descriptive English. The Imperium classifies its million worlds with numeral suffixes and Latin ordinals (Isstvan V, Stygies VIII, Ganymede Secundus, Karsk Primaris, Sedna Ultima), which is the single most recognizable pattern; a name that ends in Prime, Secundus, Tertius, Majoris, or Minoris instantly reads as 40K. Many famous worlds borrow from myth or classical history (Prospero, Tartarus, Acheron, Olympia, Colchis, Medusa) while others are pure Gothic drama (Deliverance, Perdition, Damnation, Sorrow's End).

World type shapes the name. Forge worlds sound Mechanicus (Ryza, Graia, Lathe-Het, Ferrum Malleus). Death worlds and Astra Militarum recruiting worlds get short, hard names like Krieg, Catachan, Vraks, and Volg. Ecclesiarchy shrine worlds go devotional (Ophelia VII, Cathedra, Sanctorum Majoris). Chaos-tainted or Eye of Terror worlds twist toward menace (Malfeus, Ghast, Nihilus Reach). Names built from settler nostalgia, such as Halcyon's Rest or Vandire's Landing, are also canon-accurate and give a world a history in two words.

The canonical planets in this list are for reference; the original ones are safe to drop into your own sector map.