Venerius - bishop of Milan - died on 408-05-04.
Maternus - bishop of Milan - died in 328.
Mirocles - bishop of Milan - died in 316.
Benignus - bishop of Milan - died in 472.
Senator - bishop of Milan - died on 475-05-29.
Glycerius - bishop of Milan - died on 438-09-15.
Saint Ambose of Milan fits your description.
Ambrose was a convert to Christianity and governor of Milan, Italy, before he was named bishop,
Milan Konjović died in 1993.
Milan Zloković died in 1965.
Milan Kurepa died in 2000.
Milan Crnković died in 1998.
Milan Toplica died in 1389.