Davenport

wiktionary

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The sofa sense is a genericized trademark named after the defunct furniture manufacturer A. H. Davenport and Company.

etymonline

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davenport (n.)

"large upholstered couch," 1897, apparently named for the manufacturer. Earlier (1853) "a kind of small ornamental writing table." The proper name is attested from 12c., from a place in Cheshire (Old English Devennport).