The stored `O?Duinn` was a plain ASCII O followed by a literal question mark, not an apostrophe. https://en.wikipedia.org/wiki/Our_Lady%27s_Choral_Society names him twice as Proinnsías Ó Duinn — the Irish form, with an acute on both the O and the first name, and a space rather than an apostrophe. Restoring the acute on the first name for the same reason and from the same source.