Here's a breakdown:
* He: He
* keikikāne: boy (literally "male child")
* ʻo ia: he/she/it (referring to the boy)
You can also simply say "Keikikāne" which means "boy."
Keep in mind that Hawaiian pronunciation can be tricky. The "ʻokina" (the apostrophe) is a glottal stop, similar to the sound in "uh-oh." The "ā" is a long "a" sound.