I think that's why they created a non-profit organization, Chan Zuckerberg Initiative. Non-profits are taxed differently and I'm sure they'll figure out how to get the money where it needs to be and pay as little tax as possible.
"Chan is a diminutive suffix; it expresses that the speaker finds a person endearing. Thus, using chan with a superior's name would be condescending and rude. In general, chan is used for babies, young children, and teenage girls. It may also be used towards cute animals, lovers, and close friends. "
Yeah. I have an extended family member who took both names and a friend who opted to just take on his wife's maiden name and dropped his. Another set of friends came up with a last name that was new to them both.
The hyphenating of both names is an interesting concept, but would in all practicality be a difficult thing to pass on after a few generations if it were the standard. Though maybe I'm not thinking thorough it properly.
> Surnames combined with a hyphen, such as Meier-Müller, are still allowed. Combined surnames are not official registered names, but may be used in everyday situations and recorded in your passport and identity card.
So, it's not "official" but you can use it everywhere including on your official documents.
