艾弗（Aife，爱尔兰语：Aoife，发音为“伊菲厄”）是爱尔兰神话《阿尔斯特史诗》中的一位角色，出现在“求婚埃瓦尔”（The wooing of Emer）和“伊菲厄独子之死”（The death of Aífe's only son）传奇中。据说她居住在称为阿尔皮（Alpi）的大陆东方，通常被理解是指苏格兰的阿尔巴（Alba）；或居住在"勒塔"（Letha-阿莫里卡半岛），她与女武士斯卡塔赫（Scathach） 既是姐妹，也是对手，她们都是Ardgeimme的女儿。

Aífe (Old Irish, spelled Aoife in Modern Irish, Irish pronunciation: [ˈiːfʲə]) is a character from the Ulster Cycle of Irish mythology. She appears in the sagas Tochmarc Emire ("the wooing of Emer") and Aided Óenfhir Aífe ("the death of Aífe's only son"). In Tochmarc Emire she lives east of a land called Alpi, usually understood to mean Alba (Scotland), where she is at war with a rival woman warrior, Scáthach. In Aided Óenfhir Aífe she lives in Letha (the Armorican peninsula), and is Scáthach's sister as well as rival – they are both daughters of Árd-Greimne of Lethra.