Danish
Old English Denisc, of Germanic origin; superseded in Middle English by forms influenced by Old French daneis and medieval Latin Danensis (from late Latin Dani ‘Danes’).
wiktionary
Alteration of Middle English Denish, Dench (under the influence of Dan — compare Dane), from Old English Denisċ(“Danish”), from Proto-Germanic *daniskaz.
etymonline
Danish (adj.)
"of or pertaining to Denmark or the Danes," 14c., replacing Old English Denisc "people of Denmark" (also including the Norse), with vowel change as in Dane (q.v.). As a noun, "the language of the Danes," from early 15c. Danish pastry is by 1934; shortened form danish is by 1963. It seems to have been invented in Vienna, but for some reason it was associated with Scandinavia. The Danes correctly call it Wienerbrod "Viennese bread." In reference to furniture styles, Danish modern is from 1948.
