Some claim that the Devon name, Tinners’ Rabbits, is related to local tin miners adopting it. The mines generated wealth in the region and funded the building and repair of many local churches, and thus the symbol may have been used as a sign of the miners’ patronage.[20] The architectural ornament of the three hares also occurs in churches that are unrelated to the miners of South West England.
Source: Three hares – Wikipedia
Tim B.
“An ancient German riddle describes this graphic thus:
Three hares sharing three ears,
Yet every one of them has two.[2]”