In Celtic mythology

Celtic mythology

Celtic mythology is the mythology of Celtic polytheism, apparently the religion of the Iron Age Celts. Like other Iron Age Europeans, the early Celts maintained a polytheistic mythology and religious structure...

, Adsullata was a river goddess of the Continental Celts associated with the River Savus (Sava) in Noricum

Noricum

Noricum, in ancient geography, was a Celtic kingdom stretching over the area of today's Austria and a part of Slovenia. It became a province of the Roman Empire...

. This deity is known from a single inscription found at Saudörfel, Austria

Austria

Austria , officially the Republic of Austria , is a landlocked country of roughly 8.4 million people in Central Europe. It is bordered by the Czech Republic and Germany to the north, Slovakia and Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the...

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Later she came to Brittany

Brittany

Brittany is a cultural and administrative region in the north-west of France. Previously a kingdom and then a duchy, Brittany was united to the Kingdom of France in 1532 as a province. Brittany has also been referred to as Less, Lesser or Little Britain...

 from Celtic Gaul

Gaul

Gaul was a region of Western Europe during the Iron Age and Roman era, encompassing present day France, Luxembourg and Belgium, most of Switzerland, the western part of Northern Italy, as well as the parts of the Netherlands and Germany on the left bank of the Rhine. The Gauls were the speakers of...

 and was believed to be a goddess of hot springs and the origin of the Anglo-Celtic sun goddess, Sul

SUL

SUL may stand for:* Sulaimaniyah International Airport* ICAO-code of Air Sul, а defunct Portuguese airline* ISO-639-3 code of Surigaonon language* Sul, Norway* South Region, Brazil...

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Etymology

This theonym appears to be derived from Proto-Celtic *Ad-sūg-lat-ā.
That derivation literally means "(allative) sucking liquid," which may have been a byword for the notion of ‘suck-giving liquid’ (cf. http://www.wales.ac.uk/documents/external/cawcs/PCl-MoE.pdf http://www.wales.ac.uk/documents/external/cawcs/MoE-PCl.pdf http://www.indo-european.nl/cgi-bin/query.cgi?root=leiden&basename=%5Cdata%5Cie%5Cceltic).
The Romano-British

Romano-British

Romano-British culture describes the culture that arose in Britain under the Roman Empire following the Roman conquest of AD 43 and the creation of the province of Britannia. It arose as a fusion of the imported Roman culture with that of the indigenous Britons, a people of Celtic language and...

 form of this Proto-Celtic reconstruction would likely have been *Adsuglata (cf. http://people.pwf.cam.ac.uk/dwew2/diachrony.pdf http://journals.cambridge.org/article_S0022226702001706 http://www.britannica.com/eb/article?tocId=74849&query=available%20name&ct= http://www.britannica.com/eb/article?tocId=74843&query=ogham&ct=).