Ralph

google

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1960s: origin uncertain; apparently a use of the male given name Ralph, but perhaps imitative.

wiktionary

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1960s, of uncertain origin, apparently derived from a use of the male name Ralph, but perhaps imitative.

ralph (plural ralphs)

etymonline

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Ralph

masc. proper name, shortened from Radulf, from Old Norse Raðulfr (Old English Rædwulf), literally "wolf-counsel," from rað "counsel" (see read (n.)) + ulfr "wolf" (see wolf (n.)). The Century Dictionary also lists it as English printers' slang for "An alleged or imagined evil spirit who does mischief in a printing house."