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KelchGerman nickname from Middle High German kelch "double chin", "goiter". from another meaning of Middle High German kelch "glass", "chalice", hence a metonymic occupational name for a chalice maker or a habitational name for someone living at a house distinguished by the sign of a chalice.
MaqueronFrench Of debated origin and meaning. Theories include a derivation from Picard maqueron "chin" (in which case this would have been a pejorative nickname for someone with a protruding chin) and a diminutive of Macquart.