Huynh : 1: Vietnamese (Huỳnh): variant of Hoàng (see Hoang). This form was adopted by most of Southern Vietnamese in order to avoid a naming taboo because the original form Hoang was identical to the personal name of the then ruler Nguyễn Hoàng (1525–1613 AD) when he governed the southern provinces of Vietnam (1558–1613 AD).2: Chinese: variant Romanization of the surname 黃 see Huang 1.
Source :
DAFN2 : Dictionary of American Family Names 2nd edition, ©2022 by Patrick Hanks and Oxford University Press