Isidore ( /ˈɪzədɔːr/, sometimes spelled Isidor, Isadore or Isador) is a male name of Greek origin, derived from the Greek name Ἰσίδωρος, a combination of Ἶσις δώρον meaning "gift of Isis". The name survived the suppression of the worship of the goddess Isis in the newly Christianized Roman Empire, and is, among others, the name of several Christian saints. Similar "gift" names included the Greek "Theodore" ("gift of God"), the Persian "Mithradates" ("gift of Mithras") and the Hebrew "Matanya" ("gift of YHWH").
Isadora is the equivalent female given name, the feminine form of Isidoros (Greek Ισιδωρος). The variant Isidora was the ninth most popular name for baby girls in Chile in 2006.