\text{\ae}The Latin small letter æ (ash) is a ligature of 'a' and 'e'. It is used in some orthographies, including Danish, Norwegian, Icelandic, and historical English, to represent a specific vowel sound.
The name 'Caesar' using the æ ligature.
\text{C\ae sar}The word 'encyclopaedia' using the æ ligature, as used in British English.
\text{encyclop\ae dia}The word 'archaeology' using the æ ligature, as used in British English.
\text{arch\ae ology}