Ao is a word with deep meaning, which has positive meanings such as "abstruse, mysterious and mysterious". Austrian characters are not often used for names, so they are relatively unique.
Australia is a word full of seashore flavor, with beautiful meanings such as "seashore, coast and port", and it is a word full of natural flavor. Australian characters are more popular among girls.
according to different preferences and meanings, Austria and Australia are both good choices. You can choose the right word according to your preference and meaning. If it is still difficult to decide, you can ask your family or friends for advice.