no.
Gaspard has one sibling.
He had one other sibling.
Burke and Will had one sibling.
I am not positve if a sibling can watch over another sibling when a parent is away. But I Know for a fact that if one of siblings is at least 12 the child stay home by themselves. So if one of the siblings is at least 12 i think tht sibling can watch over the other sibling while a parent is away.
sisar = sibling, sister sisaret = siblings, sisters sisarukset = siblings (of each other)
She only had one sibling. Her younger brother, Raymond.
Fergie has one sibling a sister.That's what i've heard.
Thor had one sibling, a brother named Loki.
No, siblings are people who share at least one parent.
The Convict Cichlid sibling fight with each other because of the sibling rivalry.
Biological siblings have at least one biological parent in common. See related question.
It is a rivalry caused by siblings, one wanting to be better than the other.