The dogs name

Question: In a universe there's a galaxy. In a galaxy there's a planet. In a planet there's a continent. In a continent there's a country. In a country there's a city. In a city there's a town. In a town there's a village. In a village there's a house. In a house there's a dog. What is the dog's name.

Question: People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?

Question: During what month do people sleep the least?

Question: When is 99 more than 100?

Question: What can be broken but never forgotten?

Question: What gets broken without being held?