Regulus (1961? - 1980)
Younger brother of Sirius, favored by his parents as he shared their pureblood prejudices, to the point that he joined the Death Eaters. According to Sirius, "he [Regulus] got in so far, then panicked about what he was being asked to do, and tried to back out. Well, you don't just hand in your resignation to Voldemort. It's a lifetime of service or death" (OP6). Voldemort had Regulus killed sometime during 1980 (the same year the prophecy was made and Harry was born).
Regulus = 'the little king'; a star in Leo (Remember Sirius' comment that his family thought that to be a Black meant you were practically royal.)
perhapes he didn't like the fact that his bro was sent to prison, or just couldn't stand working for Voldemort anymore and this was a way of revenge.
so what do you all think?