"Открытое письмо господину Цукербергу"
"Открытое письмо господину Цукербергу"
One example of a case when the dative form would be the same as the nominative, is if the recipient was a Mrs. Zuckerberg, since this specific kind of the last name isn't inflected when it's of the feminine grammatical gender.
There's also the dubious trend of avoiding inflection of brand names for any and all purposes—but that's just contrary to how Russian works, and is dictated instead by whims of marketing people who lack the sense for the language.
It even matches the ending of господину, which -- without the у -- sure looks like the courtesy title "Gospodin". You're sure that's not a case marker?
I think the same true for a last name such as Цукербергу. There are plenty of people with Germanic last names, especially ending with -berg, -man, -baum, etc, so maybe it is considered assimilated enough that it follows rules for Slavic based names.
If it was Putin instead of Zuckerberg, it would work just the same, "господину Путину". No difference at all, regardless of whether the last name is Russian or not.
However, Цукерберг/Zuckerberg is quite natural for Russian due to being an obviously Jewish name. The first letter isn't even the voiced ‘z’ in Russian, but a ‘ts’, because that's how analogous Jewish names are pronounced here.
Now that you mention it, that's exactly what happened with Greek too. Branding used to be Greek, then sort-of-foreignified Greek (eg Greek words with a foreign suffix) and now just English.
> first letter isn't even the voiced ‘z’ in Russian, but a ‘ts’,
That's probably because of the German pronunciation, no?
> That's probably because of the German pronunciation, no?
Well yeah. Wiktionary notes straight away that the surname is Ashkenazic—it was most probably naturalized in Russian through Ukraine's and specifically Odessa's Jewish population. The more familiar variation here is ‘Zuckerman’.
For example, Zuckerberg absolutely gets declined and gets that "oo" at the end. "To Mr. Dorsey" doesn't get changed (i.e., no added "oo" at the end) due to declining (but it still gets declined), while "to Mr. Smith" definitely gets that extra "oo" at the end due to declining. But "to Mrs. Smith" is unchanged after declining, so it doesn't get that same "oo" ending.