Niobids

In Greek mythology, the Niobids were the children of Amphion of Thebes and Niobe, slain by Apollo and Artemis because Niobe, born of the royal house of Phrygia, had boastfully compared the greater number of her own offspring with those of Leto, Apollo's and Artemis' mother: a classic example of hubris.

The number of Niobids mentioned most usually numbered twelve (Homer) or fourteen (Euripides and pseudo-Apollodorus), but other sources mention twenty, four (Herodotus), or eighteen (Sappho). Generally half these children were sons, the other half daughters. The names of some of the children are mentioned; these lists vary by author: