"Is Kaʻiulani your name?"
Translation:ʻO Kaʻiulani kou inoa?
The word e is used before a name when you are addressing that person or calling out to that person-
Hey Kaleo! = E Kaleo!
Aia ke keiki i ka lumi kuke, e Kaleo. = The child is in the kitchen, Kaleo.
‘O/‘o before a name is for other occasions, specifically when it's the subject of a sentence, or at the start of a verbless sentence, like the question in the prompt.
‘Ai ‘o Kaleo i ka mai‘a. = Kaleo eats the banana.
‘O Kaleo ko‘u inoa. = My name is Kaleo.