Hi...cool name, coool name...let me think so...
Is not an easy question but i think could be Black Sabbath 'cause Sabbath is the holy day with several meanings like the holy day of the week (Saturdays), of Jewish, for resting, for some religions and they have to obey...and the "Black" i think it's the oppositive of all these goods words...dissobey. For rock music it's a struendous name band even the best for heavy Metal music (My main band of heavy metal is Judas Priest; i love Motörhead but im absolutely disagree the Epidemic reply).
It's just my personal opinion boys!!!
See ya everybody!