I got it wrong, but have been playing with the query. If I switch from char(1) values to nchar(1) and search 65535 values, it spits out six values:

Æ198

æ230

?482

?483

?508

?509

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I don't see any other accented versions of Œ 338, and œ 339.

Excellent. And there are double letters for dz (two different forms), lj, nj too.

Fascinating.