Where does “cunquate” come from?

cunquate (Portuguese) comes from English kumquat, from Cantonese 柑橘 — kumquat.

Ancestry of “cunquate”, step by step

Step	Language	Word	Meaning
1	English	kumquat	A small, orange citrus-like fruit which is native...
2	Cantonese	柑橘	kumquat