In Celtic mythology, Nantosuelta is the goddess of nature, the earth, fire, and fertility.

A 1948 article suggests that there is an uncanny resemblance between Nantosuelta and what we know of the Irish goddess The Morrígan, who was associated with death and war. The two are compared and the authors suggest that Nantosuelta was cognate to the Irish Morrígan.^[1] This theory is not widely held or found in more recent scholarship on the subject.

The Mediomatrici (Alsace, Lorraine) depicted her in art as holding a round house on a pole and with a crow. Other likely depictions show her with a pot or bee hive. Nantosuelta's round house may have symbolized abundance. It was believed that Nantosuelta transformed into a crow on the battlefield, which was an appropriate transformation for the goddess or may have been a metaphor for her ability to powerfully navigate a battlefield.^[2]

Nantosuelta is often associated with water and depicted as being surrounded by water. The goddess's name literally translates as 'of winding stream' or 'sun-drenched valley'.^{[3][better source needed]}

Nantosuelta is attested by statues and by inscriptions.

In this relief from Sarrebourg, near Metz, Nantosuelta, wearing a long gown is standing to the left. In her left hand she holds a small house-shaped object with two circular holes and a peaked roof. Her right hand holds a patera that she is tipping onto a cylindrical altar. To the right Sucellus stands, bearded, in a tunic with a cloak on his right shoulder. He holds his mallet in his right hand and an olla in his left. Above the figures is a dedicatory inscription and below them in very low relief is a raven. This sculpture was dated by Reinach,^[4] from the form of the letters, to the end of the first century or start of the second century.

An altar from Metz has a carving of a woman with similar dress to the Sarrebourg example, also holding a small house on a pole, thus presumed to be Nantosuelta. Sucellus is not shown on that example.

A stone representing Sucellus and Nantosuelta from a cemetery near ancient Margidunum near Nottinghamshire in addition to a votive relief of Sucellus from Margidunum, combined with an abbreviated "M." at the end of the Sarrebourg inscription led scholars to conjecture that the abbreviated "M." may suggest Margi as an epithet of Nantosuelta.^[5] The abbreviation has been suggested as an attempt by the artisan to avoid invoking the name of death directly.

Since she appears paired with deity Sucellos in epigraphy, they are interpreted as consorts.^[6]

The inscription on the Sarrebourg altar^[7] reads:

Deo Svcello /

Nantosvelte /

Bellavsvs Mas /

se filivs v(otum) s(olvit) l(ibens) m(erito)

"To the god Sucellus and to Nantosuelta, Bellausus, son of Massa, willingly and deservedly fulfilled his vow."

The inscription on the Metz altar^[8] says:

In h(onorem) {r} d(omus) d(ivinae) /

M(arcus) Tignuarius /

v(otum) s(olvit) l(ibens) m(erito)

"In honour of the divine house, Marcus Tignuarius willingly and deservedly fulfilled his vow."

Here the dedication is to the Imperial house, and Nantosuelta is not explicitly mentioned. The visual depiction makes the identification secure.

According to Ranko Matasovic, the particle *nanto- means 'stream, valley'.^[9]

A section of scholars translate the second part, -suelta, as related to the Sun. Roux in 1952,^[10] Olmstead in 1994,^[11] and Polomé in 1997^[12] maintained that the proto-Indo-European root, *swel- 'swelter', found in Indo-European words denoting 'sun', was inherited into Gaulish. Thus, Xavier Delamarre asserts that the name means 'sun-warmed valley'.^[13]

Academic Miranda Aldhouse-Green interprets her name as 'winding river'.^[14]