Japanese Emperors
This is a list of the first several emperors. There are more, this is maybe 50%, but this should be enough to get you through most naming schemes. Some are unwieldy, so I would suggest picking and choosing, rather than going chronologically. Also, using Akihito would be a bad idea for reasons that are more complicated than is worth explaining, the same goes for Hirohito, unless you use the name "Shouwa".
Jimmu Suizei Annei Itoku Koushou Kouan Kourei Kaika Sujin Suinin Keikou Seimu Chuuai Jinguu (Empress, actually) Oojin Nintoku Richuu Hanzei Ingyou Ankou Yuuryaku Seinei Kenzou Ninken Buretsu Keitai Ankan Senka Kimmei Bidatsu Youmei Sushun Suikou (Empress) Jomei Kougyoku (Empress) Koutoku Saimei (Empress) Tenji Koubun Temmu Jitou (Empress) Mommu Gemmei (Empress) Genshou (Empress) Shoumu Kouken (Empress) Junnin Shoutoku (Empress) Kounin Kammu Heizei Saga Junna Ninmyou Montoku Seiwa Youzei Koukou Uda Daigo Suzaku Murakami Reizei Enyuu (This should have an apostrophe after the n, but would be problematic that way as a server) Kazan Ichijou Sanjou Goichijou Gosuzaku Goreizei Gosanjou Shirakawa Horikawa Toba Sutoku