From the tansy flower, derived from Greek 'athanasia' meaning immortality.
Tansy derives from the medieval Latin *tanaceta* and ultimately traces back to the Greek *athanasia*, meaning "immortality" — a name rooted in the belief that the tansy plant could preserve the dead and ward off decay. The herb itself, Tanacetum vulgare, was prized throughout the Middle Ages as a medicinal and culinary plant, scattered on floors to repel insects and woven into funeral shrouds. Its association with eternal life made it a quietly sacred plant in both Christian and folk traditions across Europe.
As a given name, Tansy emerged from the Victorian fashion of botanical naming — a movement that produced Violet, Daisy, Ivy, and Poppy alongside more obscure floral choices. It never achieved widespread popularity, which has given it an enduring sense of rarity and charm. It appears occasionally in British literature as the name of a whimsical or nature-connected character, lending it a pastoral, slightly fey quality that appeals to readers of fantasy and historical fiction.
In contemporary usage, Tansy sits comfortably in the same space as Clover and Fern — nature names that feel grounded rather than trendy. It is particularly popular among parents in the UK and Australia who favor names with botanical roots and old-world resonance. The name carries a bittersweet herbal quality: unusual enough to feel distinctive, old enough to feel authentic, and always slightly wild around the edges.