They don't change their name when immigrating to Canada because we select only the immigrant that have a name that we can pronounce ;)

Joke apart, I think that the majority keep their original names. Some may use another name because their original name are too hard to pronounce or write correctly in english and/or french, but it's their choice.

>Just curious, when a family immigrates in the US or Canada or Argentina or whatever country, do they eventually alter the first name and surname. If so, why and how?
>
>I'm asking this, because here in the Netherlands this is currently not the practice. The result is that a lot of immigrants have names that 'we' can hardly or not at all pronounce. A solution I see is that people alter their original name when they immigrate.