Dear Sir/Madam,
I'm about to move and live in North America soon and I have a little problem with spelling and reading my surname. Providing that i have russian background, i was taught to write my surname like:
Yuldashev. But it seems to me that the correct one should be written like:
Uldashev or even Uldasheff?
Originally, it should sound like: [ju:l'dashef]
So, could you please advise me whether to use U or Yu.

Thank you beforehand.
Kind regards,
Al