Fratricide is the murder of a brother.
pup
Her youngest sibling is eight year old Noah Cyrus.
* Unfortunately yes, sibling abuse can lead to such anger the abuser could beat the person to death or, sometimes it can lead to murder. The victim of the abuser will not likely go mad, but will certainly need psychological counseling to get over the trauma.
He has a little brother called Jake.
Murder
Sibling Rivalry
Lions' children are cubs.
Sibling rivalry.
A half brother or half sister sharing the same father is an agnate sibling. Those half siblings sharing the same mother are called uterine sibling.
a group of Blackbirds is called a murder
A group of crows is called a murder.
Murder by a mob is called lynching (li-in-ching)