Why do we have same chord but different name?

This is because in modern music, working musicians communicate a great deal of their music through chord names and progressions as opposed to reading from scores, and to do so they will use whatever chord names are convenient at the time and understood by their compatriots.

1. Why do chords have different names?
2. Can chords have different names?
3. Can the same notes have multiple names?
4. Why do some notes have two or more names to them?

Why do chords have different names?

A chord is two or more different notes played simultaneously. Chords derive their names from the root note; so a C chord has C for its root note and a G7 chord will have G. ... The interval between the root note and the third determines whether a chord is a major or minor.

Can chords have different names?

Learning to form chords can be less daunting with the knowledge that chords can have more than one name, depending on the musical context and what note you assign to be the root, thus immediately expanding the number of chords you can play, simply by renaming them.

Can the same notes have multiple names?

In other words, if two notes have the same pitch but have different letter names, we call them enharmonic. "Enharmonic intervals are intervals with the same sound that are spelled differently… [resulting], of course, from enharmonic tones."

Why do some notes have two or more names to them?

It's because of that pattern that we wind up with the notes G-A-B-C-D-E-F#-G. The notes exist because of the pattern, not the other way around. So as you're building that G major scale, when you reach the note E, you know that the next note needs to be a whole tone higher.