To answer this correctly I cant say  but in a Shonen Jump interview from when the manga first debuted over in th US the very same question is asked and Tite Kubo responds with Bleach being the title of a song By Nirvana perhaps though Im not entirely sure my memories gone a bit fuzzy on the topic i Offer this tidbit not as an absolute but as an answer to give piece of mind to Kreachure who really shouldnt worry for this is why Vandal Buster ONyx is ON the case