the usage of the term Bermuda onion dates to 1876; furthermore, there's actually a reason it's called a Bermuda, which is actually because it was "developed" there.
Plant Answers
When you label an onion as a "Bermuda," you really haven't said much. The general term "Bermuda" usually refers to the white or red onion used on hamburgers. Actually, the white "Bermuda" onion is the Crystal Wax variety and the red "Bermuda" onion is the Burgundy Red Variety. The general term "Bermuda" is nomenclature inherited by onions, which at one time were propagated on the Bermuda Islands. This procedure was followed only to enhance seed production and did not signify any specific quality factors.