What type of collection does Etarcomol and Medb have in common?
Ulster Cycle
Title: Medb
Passage: Medb (pronounced ] )—later spelled Meadhbh (] ) and Méabh (] )—is queen of Connacht in the Ulster Cycle of Irish mythology.  Her husband in the core stories of the cycle is Ailill mac Máta, although she had several husbands before him who were also kings of Connacht.  She rules from Cruachan (now Rathcroghan, County Roscommon).  She is the enemy (and former wife) of Conchobar mac Nessa, king of Ulster, and is best known for starting the "Táin Bó Cúailnge" ("The Cattle Raid of Cooley") to steal Ulster's prize stud bull.  Medb is strong-willed, ambitious, cunning and promiscuous, and is an archetypal warrior queen.  She is believed to be a manifestation of the sovereignty goddess.  Medb of Connacht is probably identical with Medb Lethderg, the sovereignty goddess of Tara, and may also be linked with the Morrígan.
Title: Collection (abstract data type)
Passage: In computer science, a collection or container is a grouping of some variable number of data items (possibly zero) that have some shared significance to the problem being solved and need to be operated upon together in some controlled fashion.  Generally, the data items will be of the same type or, in languages supporting inheritance, derived from some common ancestor type.  A collection is a concept applicable to abstract data types, and does not prescribe a specific implementation as a concrete data structure, though often there is a conventional choice (see Container for type theory discussion).
Title: Etarcomol
Passage: Etarconol is a character from the Ulster Cycle in Irish folklore.  He is the son of Eda and Léthrenn and a foster-son of Ailill and Medb.  He was the first champion to face Cúchulainn in single combat.  He was killed as Cúchulainn struck down through his crown and split him "to the navel".
Etarcomol Medb