I assumed it was from the golden color of the bran in Latin and the honey in Germanic. But phonologically, a 'c' in Latin usually maps to and 'h' in Germanic; cf. canis 'dog' ~ hound, collis 'hill' ~ hill, centum '100' ~ hundred. That takes care the of first 'c', but the last one maps to a 'g' in German Honig, which atrophied into a -y in English. Hoep that helps.