Combining Diacritical Marks Supplement

Block from U+1DC0 to U+1DFF. This block was introduced in Unicode version 4.1 (2005). It contains 58 codepoints.

The Wikipedia provides the following information on block Combining Diacritical Marks Supplement:

Combining Diacritical Marks Supplement is a Unicode block containing combining characters for the Uralic Phonetic Alphabet and Medievalist notations. It is an extension of the diacritic characters found in the Combining Diacritical Marks block.

Chart at Unicode.org (PDF)
Block at Decode Unicode