These childhood names were often superceded to an extent within a samurai's household by a certain nicknaming custom. By tradition, the eldest son in a household was known as 'Taro', the second, 'Jiro', and the third, 'Saburo'. (Fans of Akira Kurosawa's films may remember this convention being applied in the movie Ran). These familial names might even linger into a samurai's adulthood, especially while his father was still in charge.
Famous samurai and their childhood names….
Ii Naomasa: Manchiyo
Kobayakawa Takakage: Tokyujumaru
Môri Motonari: Shojumaru
Sanada Yukimura: Gobenmaru
Takeda Shingen: Katsuchiyo
Tokugawa Ieyasu: Takechiyo
Tokugawa Hidetada: Nagamaru
Uesugi Kenshin: Torachiyo
The Môri also provide an example of 'gifting' characters. Môri Okimoto (the more famous Motonari's elder brother) received the Oki in his name from the powerful Ouchi YoshiOKI, a daimyô whose lands lay just to the west. Môri Takamoto, Motonari's son, recived the Taka in his tag from Yoshioki's son YoshiTAKA. Terumoto received the Teru in his name from the Shoôgun Ashikaga Yoshiteru. However incapacitated the Ashikaga shogunate may have been as a political power, it WAS nonetheless considered an honor to receive the award of a character from the shôgun's name.
Other well-known daimyô that received the honor of a shôgunal character….
Takeda HARUnobu (Shingen)
Uesugi TERUtora (Kenshin)
Some samurai, especially lords, might opt to change the characters in their name at some future date, often as a result of the sort of reward mentioned above. Occasionally this name change might be made to mark a fortuitous event, or for political expediency. This could even extend to family names. Date Masamune, for example, was given the honorific family name Hashiba by Toyotomi Hideyoshi. During the 1590's he became close to Tokugawa (Matsudaira) Ieyasu and as a way of demonstrating his loyalty in a unsubtle gesture, he changed his family name to Matsudaira.Uesugi Kenshin provides us with a nice example of the various reasons a daimyô might change his name around. Originally called Nagao Kagetora, Kenshin later changed his name to Terutora when he was honored by the shogun, Ashikaga Yoshiteru (Kenshin being exceptionally filial to the Ashikaga). He changed his name again, to Masatora, when he was adopted by Uesugi Norimasa around 1551.
Religious names. Of course, the name Kenshin is the best known, and this provides us with an example of a Buddhist name. Many samurai - both daimyô and retainer - adopted Buddhist names at some point in their life, at least nominally taking up a monk's habit and shaving their heads. Some daimyô took this much more seriously then others (Kenshin being one of those), while a certain few, including Ôtomo Sorin, went from layman to Buddhist monk to Christian - and sometimes back again to Buddhist monk.
The following are some better-known daimyô who adopted Buddhist names (their secular names in parenthesis)...
Hôjô Soun (Nagauji)
Ikeda Shonyû (Nobuteru)
Maeda Gen-I (Munehisa)
Miyoshi Chokei (Nagayoshi)
Ota Dôkan (Sukenaga)
Ôtomo Sorin (Yoshishige)
Takeda Shingen (Harunobu)
Uesugi Kenshin (Terutora)
Yamana Sozen (Mochitoyo)
Konishi Yukinaga: Dom Agostinho
Kuroda Yoshitaka: Dom Simeo
Omura Sumitada: Dom Bartolomeu
Ôtomo Sorin: Dom Francisco
Takayama Ukon: Dom Justo
Takayama Ukon (Shigetomo)
Yamamoto Kansuke (Haruyuki)
Yamanaka Shikanosuke (YukiMôri)
The final name a samurai would assume was his death name, given to him posthumously-essentially, a spirit name, and in some cases to mark his deification. This would be used in ceremonies and observances regarding ancestor worship. Here are some famous samurai and their 'ancestor names'…
Takeda Shingen: Hôsho-in
Tokugawa Ieyasu: Tosho-daigongen
Toyotomi Hideyoshi: Hokoku daimyôjin
Uesugi Kenshin: Sôshin