羅定

Etymology
Coined in 1577 during the Ming dynasty after the Yao rebellion in Luopang, Guangdong had been quashed in 1577, intended to convey the meaning.

The first syllable is possibly borrowed from a  substrate word. proposes that is cognate with either 🇨🇬, as in, or 🇨🇬, whence 🇨🇬, 🇨🇬, 🇨🇬. Note that places with as the first character in their names are widespread in Guangdong.