Ignatius? Good gracious! This is a name making a truly surprising return, sparked by its selection by not one but two celebrities--Cate Blanchette and Julianne Nicholson.
Ignatius, the name of several saints including the founder of the Catholic Jesuit order, was considered more apt to be borne by churches and schools than babies in the recent past, though it was not unusual from the late nineteenth century to 1930; it ranked as high as Number 602 in 1913.
The nickname IGGY definitely brings Ignatius down to earth. But if you find Ignatius appealing yet can't quite go all the way, you might want to consider Inigo.
Ignatius is the middle name of Percy Weasley in the Harry Potter books, and is a major character in John Kennedy Toole's A Confederacy of Dunces.