ancuanatuath
A sign for Devanha Lane is visible at the west end of the footpath (off Polmuir Road), so the name must refer to the footpath. This is also supported by old OS National Grid maps (out of copyright) from before the service road was built, which labels the entire footpath as Devanha Lane. I've removed the name from the service road and added it to the footpath in changeset/136100957.