Jailhouse Rock lyricist, 6 letters
'The best of all possible worlds' philosopher, 7 letters
German co-discoverer of calculus, 7 letters
Mathematician/philosopher Gottfried who espoused the phrase best of all possible worlds, 7 letters
Philosopher who coined the phrase the best of all possible worlds, 7 letters
Philosopher who created the binary system and calculus, 7 letters