`  :As a matter of fact, ``Mozzafar`` is incorrect; it must be ``Mozaffar``; tashdid is on ``f`` and not on ``z``. Further, ``ad-Din`` is better than ``od-Din`` and both are better than ``al-Din``. In point of fact, even in Arabic ``al-Din`` is not pronounced ``al-Din``; the letter ``D`` in ``Din`` is a so-called Shamsi letter (to be contrasted with so-called Ghamari letters) whereby the ``al`` in ``al-Din`` renders the ``D`` in ``Din`` a moshadad ``D`` (i.e. a ``D`` with a tashdid), at the expense of ``l`` itself not being pronounced (in this connection, note the two ``d``s in ``ad-Din``, one in ``ad`` and the other in ``Din``). For details concerning Shamsi and Ghamari letters, consult this page. To summarise, the correct transliteration is Mozaffar ad-Din Shah. I must add that in Persian vernacular, one often pronounces the name as Mozaffar ed-Din Shah (note the ``e``). `