His names changed roughly as follows: Kogoro WADA (from the time of his coming-of-age ceremony until he officially succeeded to the head of the Katsura family), Kogoro KATSURA (after the age of 15), Kanji KIDO (at 33), Junichiro KIDO (after 33), and Takayoshi KIDO (after 36).
名前の大まかな推移は、和田小五郎（元服して正式に桂家を継ぐまで）→桂小五郎（15歳以降）→木戸貫冶（33歳）・木戸準一郎（33歳以降）→木戸孝允（36歳以降）である。