I did not bother with Wikipedia, however from what I learned in college I can list for you the direct ancestry the issues you brought into question: 
**BAROQUEN**- A reference to the "Church Mode" scales and chords
**SLIDE**- Is a slide is a slide. More or less established and recognized in the 19th and 20th centuries.
**GLISSANDO**- A reference to establish the way one is to play the section or piece
**GREGORIAN**- An interval or harmony once thought to be EVIL!  At one point in history this combination of notes carried the death penalty **SO** - Unlikely, since dates don't alignment on creation of such musical technology (joke) or development through the centuries

Don't get too focused on the similarly in notation. Some was established as long as 300-400 years ago, and some as recent as 50. Anything earlier than the 15th century is either written on a scroll or has been translated numerous times. That is most likely why you didn't get many replies to your questions, people probably thought the questions had complicated answers. A great deal of your secondary data is based on speculation. While it might make for interesting conversation material, it needs some heavyweight reformatting before it would make for clear question and answer material.

Craig


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