Pamper
late Middle English (in the sense ‘cram with food’): probably of Low German or Dutch origin; compare with German dialect pampfen ‘cram, gorge’; perhaps related to pap1.
wiktionary
From Middle English pamperen(“to cram with food”), from Middle Dutch *pamperen(“to cram with food”), frequentative of *pampen(“to stuff”), from Proto-Germanic *pamp-(“to swell”), from Proto-Indo-European *bamb-(“round object”), equivalent to pamp + -er.
Cognate with West Flemish pamperen(“to cram with food, overindulge”), Middle Low German pampen(“to stuff oneself”), dialectal German pampfen(“to cram”), dialectal Danish pampe(“to boast, brag”).
etymonline
pamper (v.)
late 14c., pamperen, "to cram with food, indulge with food," probably from a Low German source such as Middle Dutch (compare West Flemish pamperen "cram with food, overindulge;" dialectal German pampen "to cram"), probably from a frequentative of the root of pap (n.1). Meaning "treat luxuriously, overindulge" (transitive) is attested by 1520s. Related: Pampered; pampering.