You could call them as a brother/sister or as a cousin...
If you're asking for yourself then good luck with that family.
How many siblings you have has nothing to do with how many cousins you have or what their parent count may be. Siblings are your brothers and sisters and depends only on how may children your parents have.
Yes, these children are siblings, half siblings to be exact if they have the same biological father. So, although you may not feel as though you are still siblings, the person in question is a half sisters.
Nope - they would be 'step sisters' even if they were born at the same time. Twins would have to be born to the same mother.
I have four siblings, two brothers and two sisters.
The relationship to you would be your cousin !
Your mothers sisters Granddaughter is your second cousin
You would say "J'ai 2 frères et sœurs" in French to express that you have 2 siblings.
I would hope it would be obvious that Earth does not have brothers or sisters in a literal sense. Metaphorically speaking, the other planets could be referred to as "siblings."
No you would need all signatures of all siblings giving you the right to sell
"Hermanos" means "siblings" in Spanish. This can be either a group of brothers, or a group with brothers and sisters. "Hermanas" would be a set of only sisters.
There is limited information about Saint Valentine's family, including whether he had siblings. Some sources suggest that he may have had a brother, but the details are not well-documented or widely agreed upon.
A sibling is referred to only between brothers and sisters. The only time a parent would use the word sibling is to refer to their brothers and sisters. ::MizzCorleone