E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Ladybird, Ladyfly, Ladycow,
or May-bug. The Bishop Barnaby, called in German, Unser herrin huhn (our Lady-fowl), Marien-huhn (Mary-fowl), and Marien Käfer (Marys beetle). Cushcow Lady, as it is called in Yorkshire, is also the German Marienkalb (Lady-calf), in French, bête à Dieu. Thus the cockchafer is called the May-bug, where the German käfer is rendered bug; and several of the scarabæi are called bugs, as the rose-bug, etc. (See BISHOP.)