An Etymological Dictionary of the German Language/Annotated/Höcker
Höcker, masculine, ‘hump,’ from Middle High German hocker, hogger, hoger, masculine, ‘hump, humpback’; a substantive peculiar to High German, formed from an adjective hogga-, ‘hump-backed,’ and based on Old High German hovar, Middle High German hover, ‘humpback,’ Anglo-Saxon hofer (compare Lithuanian kuprà, feminine, ‘humpback, hump’); hogga- represents hubga, Sanscrit kubja (for kubjha?), ‘humpbacked’; compare Greek κυφός, ‘bent, bowed, stooping,’ for κυφφό-ς, kubghás?.