Dumpling

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early 17th century: apparently from the rare adjective dump ‘of the consistency of dough’, although dumpling is recorded much earlier.

wiktionary

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A folk word [c. 1600s], apparently from a Norfolk dialect, of uncertain origin. Perhaps from some Low German word or from dialectal dump(“lump”)[late 1800s], +‎ -ling(diminutive suffix).

etymonline

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dumpling (n.)

"mass of boiled paste," also "a wrapping in which something is boiled," c. 1600, Norfolk dialect, of uncertain origin, perhaps from some Low German word or from noun dump "lump" (late 18c.). Related: Dumplings.