German: 1. from the East Prussian dialect word Keicher ‘small cake’, ‘pastry’, hence a metonymic occupational name for a pastrycook. 2. South German: from Middle High German kīchen ‘to gasp for breath’, hence a nickname for an asthmatic or someone perpetually out of breath. Compare Kaucher. 3. habitational name for someone from a place called Kaichen in Hesse.