No not that i am aware of, naruto does not have a sibling
He has no known siblings
Yes, Hinata and Naruto have two children together: Boruto and Himawari. Boruto is the older sibling and a main character in the "Boruto: Naruto Next Generations" series.
Technicially it would be Gaara(even though Gaara is not a blood sibling of Naruto's) because they went through the same hardships as childhood, understand each other completely, and because they both have the tailed beasts inside them(which might make them blood relatives).
When the sand sibling including Gaara came to Hidden Leaf Village for Chunnin exams which would be episode 21 and volume 5
when a sibling is jealous of another sibling.
Usually when the older sibling is 10, 11, or 12, depending on the parent and how the older sibling and the younger sibling are like.
There is no requirement for a sibling to be in a will.
Sure, here is an example sentence using "sibling": "I have one sibling, a brother named Michael."
A sibling that is not "Half" or "Step". A sibling that shares the exact same mother and father as you.
The younger sibling was invented to worship and make things for the older sibling. The average younger sibling will make food and be very respectful in general to the older sibling. Younger siblings should never be rude or disrespecful to the older sibling, or say no to doing anything that the older sibling has asked of them.
An adoptive sibling is a person who is not another person's biological sibling, but is raised legally and socially as if they are.
sibling, associate, stepbrother, kinsman, colleague