Unicode2Entity

I am developing xml2xml conversion tool.
The XML document contains utf-8, symbol font and dingbats font character
value.
I need to convert UTF-8, symbol font and dingbats font to entity.

I have following data for conversion.

Symbol font:
\x{F061}  α
\x{F062}  β
\x{F063}  χ
\x{F044}  Δ
\x{F064}  δ
\x{F065}  ε
... (all symbol character)

Unicode
\x{21D3}   ⇓
\x{21C3}   ⇃
\x{21A6}   ↦
.. (926 unicdoe and entity)

How to find and replace the symbol font and deingbats font (non Unicode
character) using Perl5.8?

Best Regards,
JD