From Trueslant:

Pakistani diplomat Miangul Akbar Zeb was recently declined accreditation as his nation’s ambassador to Saudi Arabia. The problem, it seems, is that his name is a genital reference in Arabic.
Akbar is a common Muslim name that translates to “the greatest” or “the biggest.” Zeb is a relatively common Urdu name (زب) whose meaning in Arabic isn’t used in polite conversation. In other words, it’s a reference to the male genitals.
That’s right: In Arabic, Akbar Zeb is “the biggest [you know what]”