Fignut,
In other areas of the heirloom edible world, usually if the accepted name is not known, it is given the name of the person or group who have maintained it. For example, Myrtle's Cowpea. Aunt Jean's Pole Bean. Cherokee Trail of Tears Pole Bean (there is also a corn by this name), Cates Family Cutshort Snap Bean. It's also acceptable to name it for the place where it's grown. For example, Carolina Heading Collard, Arkansas Red and White Dent Corn. Or you can name it to reflect an outstanding characteristic of the variety. For example, there is a form of snap bean called annelino because it grows in a "c" shape. There are several form of this bean in yellow, green and purple stripe. I have not yet seen a purple form but I am looking for it. Most all of them have the word "annelino" in the name. The Tobacco Worm bean is called that because the pointed end of the bean resembles the tail end of the tobacco worm. Blue Coco had a purple pod with chocolate-colored seeds. Milk and Cider is so called because of the coloration of the mature beans. There are a whole slew of "greasy beans"--beans mainly from western NC and eastern KY area that have no microhairs on the pods, so are slick and shiny and appear greasy. Most of these are named after the individuals or families who have maintained them for more than a century. Some are name after the colors of their seeds--White Greasy, Black Greasy, Striped Greasy. Some are named after the time of year when they produce thier crop--Greasy October.
So, there, you have lots of acceptable options.
Elise