Holly
Middle English holi, shortened form of Old English holegn, holen, of Germanic origin; related to German Hulst .
wiktionary
From Middle English holly, holi, holie, a shortened variation of holin, holyn (> English dialectal hollen, holm), from Old English holeġn, holen(“holly; prince, protector”), from Proto-West Germanic *hulis(“holly”), possibly from Proto-Indo-European *ḱel-(“to cut”).
etymonline
holly (n.)
evergreen shrub especially used for decoration at Christmas, mid-15c., earlier holin (mid-12c.), shortening of Old English holegn, holen "holly," from Proto-Germanic *hulin- (source also of Old Saxon, Old High German hulis, Old Norse hulfr, Middle Dutch huls, Dutch, German hulst "holly"), cognate with Middle Irish cuilenn, Welsh celyn, Gaelic cuilionn "holly," probably all from PIE root *kel- (5) "to prick" (source also of Old Church Slavonic kolja "to prick," Russian kolos "ear of corn"), in reference to its leaves. French houx "holly" is from Frankish *huls or some other Germanic source.
