Ritz

google

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early 20th century: from Ritz, a proprietary name of luxury hotels, from César Ritz (1850–1918), a Swiss hotel owner.

wiktionary

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Back-formation from  ritzy. 

etymonline

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Ritz (n.)

s a symbol or embodiment of high quality or superiority, 1910 (Ritzian, adj., is attested by 1908), a reference to the luxurious Ritz hotels in New York, London, Paris, etc., commemorating Swiss hotelier César Ritz (1850-1918). To put on the ritz "assume an air of superiority" is recorded from 1926. A verb ritz "to behave haughtily" is recorded from 1911. As an adjective by 1926.