The name Tansy is a girl's name of Greek origin meaning "immortality". Tansy and is often added to lists like Best Cool Unusual Girls' Names and discussed in our forums with posts like "Names on NB that make you go WOW!".
From the experts:
Tansy is a flower name rarer than Rose, livelier than Lily and a lot less teasable than Pansy.
Tansy is a perennial herbaceous plant of the aster family that has clusters of small bright yellow blossoms. It was cultivated by the ancients for medicinal purposes, and has found a variety of other uses over the ages, associated with health and immortality.
There have been a couple of eponymous novels titled Tansy, and it was the name of a character on Hart of Dixie,