An Etymological Dictionary of the German Language, E (1891)
by Friedrich Kluge, translated by John Francis Davis
Erker
Friedrich Kluge2506822An Etymological Dictionary of the German Language, E — Erker1891John Francis Davis

Erker, m., ‘bow, projection (of a building), balcony,’ from the equiv. MidHG. ärker, erker, m.; the latter is formed from MidLat. arcora (a late plur. of Lit. arcus, ‘bow’)?.