Translation:Aloha e Kaleo.
It's actually before. In this case it is before a direct address (i.e. the vocative, where you call someone's name to get their attention or let them know you are talking to them). It can be a little confusing, at first, that "e" is also used for other purposes, but it gets clearer and easier to distinguish as you get used to the language.
Your question is not clear. In Hawaiian, the traditional way to greet someone (both formally and informally) is by wishing "Aloha" upon them (or between you). In English, "Hello" is most common, but English has a much greater variation of ways to greet someone. Thus, "Aloha" could also be matched with "Hi", though to be clear, they are not the same in meaning, just very similar in when and how they are used as greetings.