An Etymological Dictionary of the German Language/Höcker
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Höcker, m., ‘hump,’ from MidHG. hocker, hogger, hoger, m., ‘hump, humpback’; a subst. peculiar to HG., formed from an adj. hogga-, ‘hump-backed,’ and based on OHG. hovar, MidHG. hover, ‘humpback,’ AS. hofer (comp. Lith. kuprà, f., ‘humpback, hump’); hogga- represents hubga, Sans. kubja (for kubjha?), ‘humpbacked’; comp. Gr. κυφός, ‘bent, bowed, stooping,’ for κυφφό-ς, kubghás?.