Presuming you mean in his efforts to destroy Voldemort's horcruxes, Kreacher was his partner.
A wife or similar partner was not mentioned; he was still very young when he died.
Regulus Arcturus Black.Regulus Arcturus Black.Regulus Arcturus Black.Regulus Arcturus Black.
Regulus Arcturus Black
Regulus Arcturus Black
Regulus Arcturus Black
Yes it does. RAB is the initials of Regulus Arcturus Black, Sirius' brother.
yes
Yes, Regulus Arcturus Black was a Death Eater. He discovered Voldemort's Horcruxes after Voldemort borrowed Kreacher, his house elf, to hide one of them. Harry and Dumbledore find the locket Horcrux, which is the one Kreacher helped hide, and discover it is a fake. Inside is a note left by R.A.B who planned to destroy the Horcrux. Regulus gave the Horcrux to Kreacher, told him to destroy it and we then killed by the inferi. Nobody knew he had betrayed Voldemort until Harry, Ron and Hermione discovered he was R.A.B.
Regulus Arcturus Black
I believe it is RAB, Regulus Arcturus Black.
Regulus Arcturus Black (R.A.B) Sirius' brother.
R.A.B. was Regulus Arcturus Black. He was the brother of Harry Potter's god-father, Sirius Black. Regulus was a Death Eater, but tried to back out. He was killed during the theft of Voldemort's locket horcrux.
Regulus Arcturus Black, Sirius's brother. He is a former Death Eater who began to turn against Voldemort partly because he discovered that he planned to hurt Kreacher, the Black family house elf to achieve his goals. Regulus stole the locket horcrux, but failed to destroy it. When Voldemort discovered this, Regulus asked Kreacher that he try to destroy it, and Regulus was killed soon after. Kreacher also could not destroy the locket, so hid it away.