Who and how are chose the openings and opening names?

A lot of them have really strange or funny name, and plenty of them are really bad.

Most openings are named after the player who played it first e.g. Alekhine defence, Ruy Lopez, Evans Gambit, Nimzowitsch Indian, Bogoljubov Indian, Caro-Kann, Petrov, Pirc-Ufimtzev, Robatsch, Bird
or after the country where it was played first Scotch, English, Dutch, Sicilian, French, Scandinavian, Latvian
or after the city where it was first played Mar del Plata, Leningrad, Meran

They're often named after the inventor (such as the Grunfeld), or place of invention (such as the Catalan). Individual lines often have names relating to who played or popularized those lines, such as the Steinitz in the Ruy Lopez, or the Alapin Sicilian.

In terms of them being "really bad", I hardly think you're in a position to judge. Most openings have the power to be deadly in the right hands.

#3
if they were good some pros will use them more often ,and yes i know i m a beginner , i say ''really bad'' because a lot of them give you like -1 disadvantage or more ,and i heard from -1.5 disadvantage vs a good player you almost dead unless he make a big blunder of course.

here is a list of strange names openings and variations

http://www.chessgames.com/perl/chesscollection?cid=1029020
http://www.chessgames.com/perl/chesscollection?cid=1028585

a special mention to the Nescafe frappé Attack (copiright Nestlé)

The importance of openings is overrated. In the two games collections you give, there are several examples of weaker players beating grandmasters with "bad" openings.
Any gambit gives -1 or -2 disadvantage.
If a pro takes up an unorthodox opening, then others follow his example and it becomes a mainstream opening. Examples are Alekhine's defence, Grünfeld Indian, Nimzowitsch Indian which were all considered bad.