70%RatingSave Gender Masculine Usage Greek Mythology Scripts Κάστωρ(Ancient Greek) Pronounced Pron. /kás.tɔːr/(Classical Greek) [key·simplify] Meaning & HistoryExpand Links Greek form of Castor. Related Names RootkekasmaiUser SubmissionKastor Name DaysName Days? Croatia: February 13Denmark: March 27Poland: February 13 Categories celestial, isograms, nature