康乃 is a transliteration fragment, not a freestanding word - you almost always see it as the first two characters of a loanword. The three classics:
康乃馨 (carnation),
康乃尔 (Cornell, Tw spelling; Mainland prefers
康奈尔),
康乃狄克 (Connecticut, Tw spelling). Recognising
康乃 helps you predict an English-origin name is coming.
