cà
Cú is a Gaelic word meaning hound or dog and is commonly used as an epithet in Irish mythology and as an element in proper names. In Old Irish and modern Irish, cú appears both as a standalone noun and as a prefix in compound names, often rendered in English as “hound of” or “dog of.”
The most famous bearer of the epithet is Cú Chulainn, the central hero of the Ulster Cycle.
Cú Roí mac Dáire is another well-known figure associated with the epithet, yielding the title “the Hound
In broader usage, cú survives in modern Irish as a common noun and appears in place names,