Fidelma is an Irish female given name, a Latinized form of Fedelm. Fedelm itself likely derives from the Old Irish name Feidlimid, traditionally interpreted as "ever good" (from feidil meaning "enduring, constant"). The name ultimately shares a root with Deirdre, a figure from Irish legend whose name may mean "daughter." Etymology The name Fidelma emerges as a Latinized adaptation of Fedelm, a name borne by several women in Irish mythology, including Fedelm Noíchrothach, a daughter of Conchobar, king of Ulster. The original Old Irish Feidlimid was used by early kings of Munster and a 6th-century saint. Through this chain, Fidelma carries connotations of constancy and goodness. Cultural Significance Fidelma appears in both historical and literary contexts. In early Christianity, an Irish princess named St. Fidelma was said to have been baptized by St. Patrick. In modern popular culture, the name is most famously associated with Sister Fidelma, the main character in a series of mystery novels by Peter Tremayne. This has given the name a scholarly, medieval Irish aura. Notable Bearers Fidelma Healy Eames (born 1962), Irish politician Fidelma Macken (born 1942), Irish judge Fidelma Carter, Director of Public Health in Northern Ireland Fidelma Cox (born 1958), French-based entrepreneur Key Facts Meaning: Latinized form of Fedelm ("ever good," "constant") Origin: Irish Latinization of Old Irish names Fedelm/Feidlimid Type: Female given name Usage regions: Ireland (also used in Irish diaspora) Related names: Fedelm, Feidelm, Feidhelm, Fedelma (variant)