Pollux b
In July 2014 the International Astronomical Union (IAU) launched NameExoWorlds, a process for giving proper names to certain extrasolar planets and their host stars. The process involved public nomination and voting for the new names. In December 2015, the IAU announced the winning name was Thestias for this planet. The winning name was based on that originally submitted by theSkyNet of Australia; specifically Leda, Pollux's mother in Greek and Roman mythology. At the request of the IAU, 'Thestias' (the patronym of Leda, a daughter of Thestius) was substituted. This was because 'Leda' was already attributed to an asteroid known as 38 Leda and to one of Jupiter's satellites known as Leda.