“Matrona’s themes are the harvest, providence, health, abundance, autumn and love. Her symbols are Swiss cheese and water. This Teutonic Mother Goddess is the great provider of both food and refreshment, especially freshwater. A benevolent figure, She personifies the earth’s abundance during the fall and offers to share of that wealth freely. Judging from artistic depictions of Matrona in the company of a dog, or carrying palm fronds, She may have also had a connection with the healing arts.
People in the Swiss Alps gather today to enjoy the fruits of their labors, specifically cheese that has been stored in cellars since grazing season in the summer. In many ways this is a harvest rite, rejoicing in Matrona’s ongoing providence.
Consider enjoying a Swiss fondue today, complete with sliced harvest vegetables and breads from Matrona’s storehouse. The melted cheese inspires warm, harmonious love. Matrona makes that love healthy and abundant.For physical well-being and self-love, simply add some sautéed garlic to this blend, or add other herbs known to combat any sickness with which you’re currently coping.
Other ways to enjoy this Goddess and invite her into your day – Have an omelette with cheese and harvest vegetables for breakfast, or grilled cheese and ice water at brunch. If you own a dog, share a bit of your healthful meal with it!”
(Patricia Telesco, “365 Goddess: a daily guide to the magic and inspiration of the goddess”.)
In many areas She was worshipped as a triple Goddess, and known as Deae Matres (or Deae Matronae), with a wider sphere of believed influence. This triadic deity is well attested throughout northern Europe (more generally as the Matres or Matrones), not just in Celtic areas, and was similar to the Fates, Furies, Norns, and other such figures.
The Gaulish theonym Mātr-on-ā is interpreted to mean ‘great mother’. The name of Welsh mythological figure Modron, mother of Mabon is derived from the same etymon. By analogy, Dea Matrona may conceivably have been the mother of the Gaulish Maponos.” 
Conerning Modron: “In Welsh mythology, Modron (‘divine mother’) was a daughter of Afallach, derived from the Gaulish Goddess Matrona. She may have been the prototype of Morgan le Fay from Arthurian legend. She was the mother of Mabon, who bears Her name as ‘Mabon ap Modron’ (‘Mabon, Son of Modron’) and who was stolen away from Her when he was three days old and later rescued by King Arthur.
Her Gaulish counterpart Matrona is a Celtic mother Goddess and tutelary Goddess of the River Marne. She is also a fertility and harvest deity often equated with Greece’s Demeter or Ireland’s Danu. In Britain, She appears as a washerwoman, and thus there would seem to be a connection with the Morrígan.” 
Pertaining to Deae Matres, Patricia Monaghan tells us that “Their names – bestowed by scholars – may be Latin, but the Deae Matres were Celtic, the primary divine image of the continental tribes. No legends survived of this trinity of earth Goddesses, although hundreds of inscriptions and sculptures attest to the strength of Their worship.
Their religion was apparently destroyed early in the Roman occupation, but Their names and images survived into the days of the empire. They were were then called sorceresses of the early days, thus holding the attention and reverence of their people in ancient Gaul and Germany.
The ‘mother Goddesses’ – for this is what their Latin name means – were always shown as three robed women bearing baskets of fruit and flowers; sometimes they also carried babies. Seated under an archway, They were depicted wearing round halolike headdresses; the central Goddess was distinguished from the others by standing while They sat or by sitting while They stood. They were probably ancestral Goddesses, rulers of fruitfulness of humanity as well as that of the earth” (p. 99).
Monaghan, Patricia. The New Book of Goddesses and Heroines, “Deae Matres”.
Wikipedia, “Dea Matrona“.
Her Cyclopedia, “The Triple Goddess Deae-Mates“.
Joellessacredgrove.com, “Deae Matres“.
Journal of a Poet, “Morgan Le Fay“.
Spangenberg, Lisa L. Digitalmedievalist.com, “Who is the Celtic Mother Goddess?”
Took, Thalia. Amusedgrace.blogspot.com, “Goddess of the Week: Morgana“.
Wikipedia, “Matres and Matrones“.