How to pronounce 孟 in Cantonese (4 out of 5):

佢叫做
It's called Menguang.

Cantonese Sentence Breakdown

heoi5
he
she
it (Cantonese)
Mandarin equivalent: 他tā [他]
叫做 giu3 zou6
called
maang6
first month of a season
eldest amongst brothers
first in series
a surname
eminent
loeng6
bright
clear
resonant
to shine
to show
to reveal
brightly, with understanding