Answer
ˈʒil ˈmylɐ is the Luxembourgish pronunciation of Müller. The "ʒ" represents the voiced postalveolar fricative sound, similar to the "s" in "measure". The "l" is pronounced with a dark "l" sound, as in "bell". The "y" represents the close front rounded vowel, as in "fur". The "m" is pronounced with a bilabial nasal sound, as in "man". The "u" represents the close back rounded vowel, as in "put".