Geranium Gin is said to be the result of a father and son team setting out to make the world's most perfect gin. The name comes from the addition of a particular botanical—namely, the geranium—that would blend with the "inevitable juniper." The geranium is harvested from Denmark and used fresh for the distilling along with 9 other botanicals. The father used his training as a chemist and the son his training as a spirits judge.
See the excellent write-up at Oh Gosh