The name Danbo is a pun on the Japanese word for corrugated cardboard “danboru” (ダンボー). There’s also a company in Japan which makes cardboard boxes which has Danbooru in its name.
There have been a few variations on this name in the west, based on different translations from the original manga. If you’re looking around the Internet for Danbo-related things, she can be found under all of these:
- Danbo
- Danboard
- Danboru
- Danbooru
- Cardbo