A not-so-fun fact: The Tetsuya in his name is actually 徹也. Just a coincidence that it sounds the same as "staying up all night". Fun coincidence though.
My wife and her cousin both have the name Hiroko, but the kanji is different so they're different names. It's like Lewis and Louis, or Stuart and Stewart. Anglophones seem to have a hard time grasping that, despite it being quite common in English