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English word marm comes from English madam
madam (English)
(colloquial) A conceited or quarrelsome girl.. (slang) A woman who runs a brothel, particularly one that specializes in finding prostitutes for rich and important clients.. A polite form of address for a woman or lady.. The mistress of a household. (transitive) To address as "madam".
marm (English)
(archaic) madam; a polite term of address for a lady.