The word Dutch comes from the Old English word Dutch (which means people) by which the English described the people who lived in the area of what is now The Netherlands. The English made a distinction between 'Low Dutch' referring to the area which was more flat, The Netherlands and 'High Dutch' referring to the area which was more mountaineous, nowadays Southern Germany. The name Dutch stayed for people of The Netherlands.
The word Netherlands comes from the English words of 'nether' (low lying), since the land in The Netherlands is flat and a part of the country lies even below sea-level.
Holland comes from a Old Dutch word which basically means woodland. This was simply because there used be a lot of woodlands in that area. During the history of The Netherlands, the part of Holland (which comprised only one province of the whole country), became so dominant (politically, economically, culturally etc.) that people used both Holland and The Netherlands to describe the country.
No, not at all.
It so safe it is actually boring.
But I am just lazy.