Jupiter (mythology) practice of swearing by Jove to witness an oath in law courts is the origin of the expression "by Jove!"—archaic, but still in use. The name of the god was also adopted as the name of the planet Jupiter; the adjective "jovial" originally described those born under the planet of Jupiter (reputed to be jolly, optimistic, and buoyant in temperament). Jove was the original namesake of Latin forms of the weekday now known in English as Thursday (originally called "Iovis Dies" in Latin). These became "jeudi" in French, "jueves" in Spanish, "joi" in Romanian, "giovedì" in Italian, "dijous" in Catalan,
Jove Books were featured, as edited for Pyramid by Byron Preiss, and featuring contributions from, among others, Ellison, Philip José Farmer, Jeff Jones, Archie Goodwin, Michael Moorcock, Beth Meacham, Jim Steranko, Ted White and novels as well as short fiction by Ron Goulart. Another Preiss project with Pyramid was in more-traditional, if early, graphic novel format, the "Fiction Illustrated" series. The Jove branding was refocused not long after the purchase by the Putnam Berkeley Group, away from fantastic fiction generally and more toward crime fiction, further publication of John Jakes's and similar historical fiction, romance novels (including some with fantasy elements), and