粵語辭源: 259_4CantonWordFeedbackJyutping:ngau4 gung1Original phonetic: ngeo4 gung1公牛。(白宛如:1998:207)References: 光背頂山東南爲獅子背山,西南爲~鼻山。(陳伯陶《東莞縣志》卷五葉五)