Named after the trail I hid it on. Who _IS_ Molli Malarkey? I did a quick search and came up empty, but I found on TrailForks that the trail is (or was) a 570 m mountain biking route (XC/gravel), maybe named after someone who rode it often? Perhaps we will never know.
Please use your geosenses the best you can as my GPS flat out refused to settle down on a location. It is hidden well enough that it won't accidentally be seen by a muggle (hopefully), but can easily be seen by a fellow geocacher.