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It's just a <a rel="nofollow" class="external text" href="https://en.wiktionary.org/wiki/tatterdemalion">standard English word</a> being used in two independent places. Like when you buy <a href="/wiki/F.F._Gebrandt%27s_Superior_Laudanum" title="F.F. Gebrandt's Superior Laudanum">F.F. Gebrandt's Superior Laudanum</a> from the Extramural Trading Company, the shopkeeper isn't referring to Mrs Plenty.