U+A750 is “LATIN CAPITAL LETTER P WITH STROKE THROUGH DESCENDER” and HTML Entity #42832;
To insert it into your document, type “Alt+42832”.
U+A751 is “LATIN SMALL LETTER P WITH STROKE THROUGH DESCENDER” and HTML Entity #42833;
To insert it into your document, type “Alt+42833”.
U+204A is “TIRONIAN SIGN ET” and HTML Entity #8266;
To insert it into your document, type “Alt+8266”.

Here are some of the fonts supporting these characters:
DejaVu Sans
Microsoft YaHei
Microsoft YaHei UI
Nirmala UI
OpenSymbol
Serge UI
SimSun
Tahoma
Yu Gothic UI

When searching for Unicode characters, you might want to have a look at Unicode Character Finder