The Irish Water Spaniel is primarily known by its official registered name, which has remained remarkably consistent since the breed's formal recognition in the mid-19th century. Unlike many breeds that have accumulated numerous nicknames and alternate designations over time, the Irish Water Spaniel maintains its formal name in most contexts, reflecting the breed's distinctive identity and relatively specialized role in the sporting dog world. This consistency in naming helps maintain clear breed identity and prevents confusion with other water-retrieving breeds.
Within Ireland, the breed's country of origin, the name Irish Water Spaniel has been used consistently since the breed's development by Justin McCarthy in Dublin during the 1830s and 1840s. Irish sportsmen and hunters recognize the breed by this name, acknowledging its heritage as Ireland's native water retriever. The breed holds special significance in Irish sporting dog history as one of the few breeds developed entirely within Ireland, giving the name particular cultural and historical importance that has been carefully preserved.
Among enthusiasts and breed club members, the abbreviated form IWS commonly appears in written communications, social media posts, and informal discussions. This shorthand provides convenient reference while maintaining the breed's identity, appearing frequently in dog show catalogs, hunting publications, and breed club newsletters. The abbreviation has become widely recognized among those familiar with sporting breeds, though the full name remains preferred in formal contexts to ensure clarity for those less familiar with the breed.
Some hunters and field trial participants occasionally refer to these dogs simply as Water Spaniels when context makes the Irish origin clear, though this usage is less common due to potential confusion with the American Water Spaniel, another distinct breed. The specific designation "Irish" in the breed name serves the important function of distinguishing this tall, curly-coated spaniel from its American cousin, which shares water-retrieving heritage but differs significantly in size, coat type, and appearance. Maintaining the full breed name helps preserve clarity about which water spaniel breed is being discussed.
Historically, during the breed's early development and in some older literature, the Irish Water Spaniel was occasionally referred to as the Shannon Spaniel, referencing the River Shannon in Ireland where the breed was frequently used for waterfowl retrieving. This regional name emphasized the breed's association with Irish waterways and its role as a specialized water retriever. However, this designation fell out of common use as the breed name became standardized through formal kennel club recognition and breeding records. Today, references to "Shannon Spaniel" appear primarily in historical contexts or breed history discussions rather than as a current alternate name.
Internationally, the breed name translates relatively consistently across different languages, with most countries adopting direct translations that maintain the essential elements of Irish origin and water spaniel type. In France, the breed is known as Épagneul d'Eau Irlandais; in Germany as Irischer Wasserspaniel; in Spain as Perro de Agua Irlandés; and in Italy as Spaniel d'Acqua Irlandese. These translations preserve the breed's identity while conforming to local linguistic conventions. The breed's distinctive appearance, particularly its unique rat tail and tightly curled liver-colored coat, makes it instantly recognizable regardless of name variations, ensuring minimal confusion about breed identity across international boundaries and helping maintain consistent breed type worldwide.

