 In Welsh poetry the name is always spelled "Arthur" and is exclusively rhymed with words ending in "-ur"—never words ending in "-wr"—which confirms that the second element cannot be "[g]wr" "man".An alternative theory, which has gained only limited acceptance among professional scholars, derives the name Arthur from Arcturus, the brightest star in the constellation Boötes, near Ursa Major or the Great Bear.Classical Latin "Arcturus" would also have become "Art(h)ur" when borrowed into Welsh, and its brightness and position in the sky led people to regard it as the "guardian of the bear" (which is the meaning of the name in Ancient Greek) and the "leader" of the other stars in Boötes.