Does (did) German have something like what they call possessive apostrophe
If not, what does the role of it in German language?
This is my father's hat.
My best friend's husband.
German attaches the genitive suffix without an apostrophe.
You will occasionally see " 's " as a genitive ending in German,
but that is - to put it mildly - inspired by English orthography, and incorrect in German.
No, it doesn't. German has a possessive -s without the apostrophe.
Using a possessive apostrophe anyway is a fairly common mistake, especially by people whose native language is English, but it's certainly not correct.