" refers to the Mandarin romanizations
of the Chinese surnames 羅
: Luó, Jyutping
: Lo4) and 駱
: Luò, Jyutping
: Lok3). Of the two surnames, 羅
is much more common among Chinese people.
In Cantonese, 羅 is usually romanized as Law and sometimes Loh, or Lowe, and 駱 is usually romanized as Lok although the more Western-appearing romanization Locke can sometimes be found.
In Vietnam, the name 羅 is pronounced La and 駱 is pronounced Lạc.