Why don't East Asian keep their native name?

Tired of correcting the illiterate Americans.

Vietnamese are not East Asian and like I've said so many times, its because westerners can't spell Chinese names correctly, however Korean names are a bit easier for them although not as easy as Japanese names, that's why the Japanese don't have English names, except if they are born in the west.

"Dick" is a common enough surname and "William (Billy)" is a common enough first name. Why do you find it amusing? There have been some famous William ***** around, here are some of them:

Billy Dick (1889–1960), Australian rules footballer
William Dick (Australian politician) (1865–1932)
William Dick (cricketer) (1922–2004), Australian cricketer
William Dick (footballer) (born 1901), Scottish footballer
William Dick (Manitoba politician) (1821–1904), politician in Manitoba, Canada
William Dick (Wisconsin politician), member of the Wisconsin State Assembly
William Dick (British Columbia politician), member of the Legislative Assembly of British Columbia
William Reid Dick (1879–1961), Scottish sculptor
William Wentworth FitzWilliam Dick (1805–1892), member of the UK Parliament for Wicklow
Willie Dick (footballer) (born 1966), Australian rules footballer
William Dick (veterinary surgeon) (1793–1866), founder of the Royal (Dick) School of Veterinary Studies in Edinburgh, Scotland

It is common for people migrating to a new country to take a new name if their old name might be difficult for locals to pronounce. I notice you hide behind the blue mask of cowardice so no-one can laugh at your name.

He may have been making fun of you ... Willam, Billy, Dick is a stereotype.

Cause the rest of the world are not able to pronounce their name / pronounce it incorrectly.