I can’t answer this question because you need evidence, so you should go read your article
1. All the people employed by a particular organization.
"a staff of 600"
2. a group of officers assisting an officer in command of an army formation or administration headquarters.
"the Polish General and his staff"
Answer:
Essentially, the word “blackberry” (as you might guess) came from our ancestors looking at a berry-like fruit that was black, and deciding on a simple name for it. The word “black” comes from the Old Norse word for the color, which was “blakkr.” This developed into “blaec” in Old English.
Red, black, blue, and green.
