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German: occupational name for a roofer (thatcher tiler slater or shingler) or a carpenter or builder from an agent derivative of Middle High German decke ‘covering’ a word which was normally used to refer to roofs but sometimes also to other sorts of covering; modern German Decke still has the twin senses ‘ceiling’ and ‘blanket’. Dutch: variant of Dekker cognate with 1 above. Compare De Decker . English (London): variant of Dicker .
Source: Dictionary of American Family Names 2nd edition, 2022