Nyx at rank 1398 is a name from the deep end of Greek mythology: the primordial goddess of night, one of the first beings to emerge from Chaos, mother of Sleep and Death. On a dog, that etymology produces maximum mythological intensity in three letters: compact, dark, and completely unusual.
The Night Goddess
In Hesiod's Theogony, Nyx is described as a figure so powerful that even Zeus feared her. She is the personification of night itself, pre-Olympic and elemental. For owners choosing this name for female dogs, the mythology is almost always the draw: they want a name that carries genuine ancient weight without being commonly known. Black Labs and dark-coated dogs are the obvious physical match.
Three-Letter Name Power
NYX: one syllable, three letters, the X ending is distinctive in a way few names achieve. It calls sharply and memorably. The name sits alongside Rex and Jax in the X-ending category, but with far deeper mythology. The dark-academia aesthetic in pet naming has made Nyx more visible recently.
The Counter-Reading
Nyx suits dark, intense personalities. It reads slightly awkward on a golden-coated, perpetually cheerful dog. Owners should be honest about whether their dog has the gravity the name promises before committing to it.