Cyrillic Capital Letter Yeru With Diaeresis
HTML Entity Browser Test:

U+04F8 is the Unicode hex value of the character Cyrillic Capital Letter Yeru With Diaeresis, which is categorized as "uppercase letter" in the Unicode 6.0 character table.

In addition, U+04F8 is a composite character comprising of one or more other Unicode characters modified or combined.

Unicode Character Information
Unicode Hex U+04F8
General Category Uppercase Letter [Code: Lu]
Canonical Combining Class 0
Bidirectional Category L
Decomposition Mapping 042B 0308
Mirrored N
Lowercase Version U+04F9
Unicode Character Encodings
Cyrillic Capital Letter Yeru With Diaeresis HTML Entity Ӹ (decimal entity), Ӹ (hex entity)
Windows Key Code Alt 1272 or Alt +04F81
Programming Source Code Encodings Python hex: u"\u04F8", Hex for C++ and Java: "\u04F8"
UTF-8 Hexadecimal Encoding 0xD3B8
1 To type a Unicode symbol in Windows, hold down the ALT key and enter the decimal or hexadecimal code provided using the numeric keypad. The decimal alt code (Alt 1272) will only work on computers with support for this Unicode character in the active code page. The hexadecimal alt code (Alt +04F8) will work for all Unicode characters provided Hex input from the numeric keypad is enabled.
* If the Cyrillic Capital Letter Yeru With Diaeresis character does not display correctly in your browser, you may not have a Unicode font on your system that supports this particular symbol.