How would you pronounce these foreign names?

When you come across foreign names, do you know immediately how to pronounce them?
For example:
1. Nicolae
2. Tache
3. Fortaleza
4. Kien Giang
5. Gerti
6. Niedersachsenaged
7. Krister Nylander
8. Bollstabruk

And what about the stress?

Regards,
D.

Thanks for having a go, Mr M.
Well, I'm afraid I have no idea how well you did
I'm not surprised about 'lei' in 3 (I see a parallel with 'Venezuela'), but as for 5, I expected 'ge:'.
In 4, why 'g' rather than sound heard in 'gem'? Any analogies?
And in 8, the last vowel is not from the English vowel system. Does it imply that when you see a foreign name you try to guess the original pronunciation rather than read it in accordance with the English pronunciation system?
Does this phenomenon occur with the word 'genre'?

Best regards,
Demicjusz /de 'mi:ts yoush/
(At first, my nick was demi1, I used it on Polish forums, then on English ones, but I soon realised people understood it as a female name, so I added '-cjusz', which, at least in Polish, immediately shows masculinity; then I found I was addressed as 'Demi' again...
but I don't mind

P.S. Looking forward to other interpretations of the eight examples.

Hi Demicjusz (whom I call 'Demi' not because I thought you were female, but because the combination of vowels in your suffix are difficult to remember and copy down),

No excuses, no analogies-- I just incorporate what sounds I seem to remember about some foreign languages of which these might be examples, and plunge in. 'Genre' is English, retaining (to a varying degree) its French pronunciation, so that is general knowledge. I have no precedents to rely on for my Chinese pronunciation; I have a little for my Germanic, hence the 'ü' in '-bruk'. I use that knowledge if I have it.

Also, I don't have a full set of IPA symbols, which I would dearly love to find somewhere. Any sources?

Hi
I know Kiên Giang. It's a province in my country, Việt Nam.
For other names, I can pronounce some.
But I think it's necessary to realize what languages these words belong to and to learn some pronounciation features of these languages. As a result, you can take it easy to pronounce these words. However, hardly anyone knows how to say them out loud correctly at the first glance.
My native language is Vietnamese, so Kiên Giang is extremely easy for me to pronounce. One thing I would like to let you know: Vietnamese has no word stress because it's monosyllabic and of course, it's different from other multisyllabic languages.
I'll give you some other Vietnamese proper words (personal names, place names):
Nguyễn Thế Hoàng Linh
Tạ Thị Phương Nam
Vũng Tàu
Thành phố Hồ Chí Minh
Hope you'll find it interesting to learn and discover my language and others as well.
Bye
Minh Nguyet (my name, in English it means bright moon)