英文版里是在第52頁(yè)的第18行有這么一句“Sirius was the very last of the line as his younger brother,Regulus,predeceased him and both were childless.”(小天狼星是他的家族里最后一個(gè)傳人，因?yàn)樗牡艿芾坠爬账顾涝谒�，而他們都沒(méi)有孩子)
\"my parents, with their pure-blood mania, convinced that to be a Black made you practically royal...my idiot brother, soft enough to believe them... He was younger than me, and a much better son, as I was constantly reminded...\"
—Sirius telling Harry Potter about Regulus
在第5本里，書(shū)中明確說(shuō)明了小天狼星是雷古勒斯的哥哥——小天狼星說(shuō)過(guò)“他比我小”
人文里說(shuō)哥哥在這里：
【是啊，想當(dāng)年，他可是你父親在學(xué)校的好朋友。布萊克家的人都在我們學(xué)院，沒(méi)想到小天狼星卻到了格蘭芬多！真可惜——他是個(gè)很有天分的男孩。他進(jìn)校時(shí)，他哥哥雷古勒斯就在我們學(xué)院，要是兩個(gè)人都在我那兒就好了�！薄�
　　英文原版是這樣的：
　　【\"Well, anyway, he was a big pal of your father\'s at school. The whole Black family had been in my House, but Sirius ended up in Gryffindor! Shame—he was a talented boy. I got his brother, Regulus, when he came along, but I\'d have liked the set.\"】顯然是人文翻譯錯(cuò)了么……這個(gè)when he came along是指Regulus，整句話(huà)是說(shuō)，不過(guò)我他的兄弟雷古勒斯進(jìn)校我就得到他了，不過(guò)我更希望能得一雙。
顯然沒(méi)說(shuō)是哥哥啦，原文沒(méi)這么寫(xiě)咯
另外，英國(guó)百科網(wǎng)這樣寫(xiě)……
Regulus Arcturus Black (1961 - 1979), also known as R.A.B
Sirius Black III (c. 1959[1] - June 17, 1996)
——這都是算出來(lái)的啊……
羅琳同學(xué)不至于犯這么弱智的錯(cuò)啦
【【【【【當(dāng)然了……你硬要把雷古勒斯說(shuō)成哥哥也沒(méi)啥……關(guān)鍵是……西里斯才是家族正統(tǒng)繼承人啊……所以西里斯是家族重點(diǎn)培養(yǎng)對(duì)象，雷古勒斯屬于二等貨，西里斯是繼承家族的“頂梁柱”，而他不負(fù)責(zé)任逃跑追求新理想去了，于是雷古勒斯為此承擔(dān)責(zé)任……所以才被眾人唾棄……你這么一寫(xiě)，整成家族拋棄長(zhǎng)子，保留次子的愛(ài)護(hù)行為了，不符合布萊克家族的一貫風(fēng)格……】】】】】

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